Tests: do not report backend diagnostics in diagnostic tests

There's a separate test data directory `testsWithJvmBackend` with a
runner that properly invokes the JVM backend and reports diagnostics
from it. All tests where JVM diagnostic presence/absence is important
were copied/moved there in this and previous commits.

The problem with the code removed in this commit is that it invoked some
parts of the _old JVM backend_ and old light classes, which is very far
from what users see in the production compiler at this point. This led
to real issues where we implemented incorrect behavior in K2 based on
the misleading diagnostic report from the K1 test.

The diagnostic in `triangleWithFlexibleTypeAndSubstitution4.kt` was
removed, but there's a copy of this test in `codegen/box/javaInterop`
which fails for K2 (KT-66529).

The diagnostic in `intersectionWithMappedSignature.kt` was removed and
that is OK because at this point CONFLICTING_JVM_DECLARATIONS there
seems like a bug in the old JVM backend.

compiler/testData/diagnostics/tests/j+k/collectionOverrides/intersectionWithMappedSignature.fir.kt

@@ -1,38 +0,0 @@
-// FULL_JDK
-// SCOPE_DUMP: B1:remove, B2:remove
-// FILE: Java1.java
-public interface Java1 {
-    Boolean remove(Integer element);
-}
-
-// FILE: testRemove.kt
-import java.util.*
-
-// CONFLICTING_JVM_DECLARATIONS in K1 is only reported with old backend, not with K1.
-class B1 : ArrayList<Int>(), Java1 {
-    override fun remove(element: Int?): Boolean {
-        return false
-    }
-}
-
-// CONFLICTING_JVM_DECLARATIONS in K1 is only reported with old backend, not with K1.
-class B2 : ArrayList<Int>(), Java1 {
-}
-
-// FILE: Java2.java
-public interface Java2 {
-    Character get(Integer i);
-}
-
-// FILE: MyString.java
-public abstract class MyString implements CharSequence {
-    @Override
-    public char charAt(int i) {
-        return 'c';
-    }
-}
-
-// FILE: testRenamed.kt
-abstract class B3 : MyString(), Java2 {
-    override fun get(i: Int?): Char? = null
-}

compiler/testData/diagnostics/tests/j+k/collectionOverrides/intersectionWithMappedSignature.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // FULL_JDK
 // SCOPE_DUMP: B1:remove, B2:remove
 // FILE: Java1.java
@@ -8,14 +9,12 @@ public interface Java1 {
 // FILE: testRemove.kt
 import java.util.*
 
-// CONFLICTING_JVM_DECLARATIONS in K1 is only reported with old backend, not with K1.
+class B1 : ArrayList<Int>(), Java1 {
-class <!CONFLICTING_JVM_DECLARATIONS!>B1<!> : ArrayList<Int>(), Java1 {
+    override fun remove(element: Int?): Boolean {
-    <!CONFLICTING_JVM_DECLARATIONS!>override fun remove(element: Int?): Boolean<!> {
         return false
     }
 }
 
-// CONFLICTING_JVM_DECLARATIONS in K1 is only reported with old backend, not with K1.
 class B2 : ArrayList<Int>(), Java1 {
 }
 
@@ -35,4 +34,4 @@ public abstract class MyString implements CharSequence {
 // FILE: testRenamed.kt
 abstract class B3 : MyString(), Java2 {
     override fun get(i: Int?): Char? = null
-}
+}

compiler/testData/diagnostics/tests/j+k/collectionOverrides/intersectionWithMappedSignature.overrides.txt

@@ -22,4 +22,3 @@ B2:
             [SubstitutionOverride(DeclarationSite)]: public abstract override fun remove(element: R|E|): R|kotlin/Boolean| from Substitution scope for [Use site scope of kotlin/collections/MutableCollection] for type kotlin/collections/MutableList<E> [id: 11]
               [Library]: public abstract fun remove(element: R|E|): R|kotlin/Boolean| from Use site scope of kotlin/collections/MutableCollection [id: 8]
     [Enhancement]: public abstract fun remove(element: R|kotlin/Int!|): R|kotlin/Boolean!| from Java enhancement scope for /Java1 [id: 13]
-

compiler/testData/diagnostics/tests/j+k/primitiveOverrides/triangleWithFlexibleTypeAndSubstitution4.kt

@@ -21,7 +21,7 @@ open class C : A<Int>()
 
 interface D : B<Int>
 
-class <!CONFLICTING_INHERITED_JVM_DECLARATIONS!>E<!> : C(), D
+class E : C(), D
 
 fun main() {
     E().foo(42)

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/directives/DiagnosticsDirectives.kt

@@ -5,7 +5,6 @@
 
 package org.jetbrains.kotlin.test.directives
 
-import org.jetbrains.kotlin.test.backend.handlers.JvmBackendDiagnosticsHandler
 import org.jetbrains.kotlin.test.directives.JvmEnvironmentConfigurationDirectives.USE_JAVAC
 import org.jetbrains.kotlin.test.directives.model.SimpleDirectivesContainer
 import org.jetbrains.kotlin.test.frontend.classic.handlers.ConstantValuesHandler
@@ -54,14 +53,6 @@ object DiagnosticsDirectives : SimpleDirectivesContainer() {
         """.trimIndent()
     )
 
-    val REPORT_JVM_DIAGNOSTICS_ON_FRONTEND by directive(
-        description = """
-            Collect additional jvm specific diagnostics on frontend
-            Note that this directive is not needed if ${JvmBackendDiagnosticsHandler::class} 
-              is enabled in test 
-        """.trimIndent()
-    )
-
     val RENDER_PACKAGE by stringDirective(
         description = """
             Dump declaration from packages listed in directive

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/frontend/classic/handlers/ClassicDiagnosticsHandler.kt

@@ -5,24 +5,17 @@
 
 package org.jetbrains.kotlin.test.frontend.classic.handlers
 
-import com.intellij.psi.util.PsiTreeUtil
 import org.jetbrains.kotlin.checkers.diagnostics.SyntaxErrorDiagnostic
 import org.jetbrains.kotlin.checkers.utils.CheckerTestUtil
 import org.jetbrains.kotlin.checkers.utils.DiagnosticsRenderingConfiguration
-import org.jetbrains.kotlin.cli.jvm.compiler.getJvmSignatureDiagnostics
 import org.jetbrains.kotlin.descriptors.impl.ModuleDescriptorImpl
-import org.jetbrains.kotlin.diagnostics.Diagnostic
 import org.jetbrains.kotlin.diagnostics.Errors
-import org.jetbrains.kotlin.diagnostics.Severity
-import org.jetbrains.kotlin.platform.jvm.isJvm
-import org.jetbrains.kotlin.psi.KtDeclaration
 import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.resolve.AnalyzingUtils
 import org.jetbrains.kotlin.resolve.calls.smartcasts.DataFlowValueFactoryImpl
 import org.jetbrains.kotlin.test.directives.AdditionalFilesDirectives
 import org.jetbrains.kotlin.test.directives.DiagnosticsDirectives
 import org.jetbrains.kotlin.test.directives.DiagnosticsDirectives.MARK_DYNAMIC_CALLS
-import org.jetbrains.kotlin.test.directives.DiagnosticsDirectives.REPORT_JVM_DIAGNOSTICS_ON_FRONTEND
 import org.jetbrains.kotlin.test.directives.LanguageSettingsDirectives
 import org.jetbrains.kotlin.test.directives.model.DirectivesContainer
 import org.jetbrains.kotlin.test.frontend.classic.ClassicFrontendOutputArtifact
@@ -54,10 +47,6 @@ class ClassicDiagnosticsHandler(testServices: TestServices) : ClassicFrontendAna
             allDiagnostics = allDiagnostics.filter { it.factory.name != Errors.NEWER_VERSION_IN_SINCE_KOTLIN.name }
         }
 
-        if (allDiagnostics.none { it.severity == Severity.ERROR }) {
-            allDiagnostics = allDiagnostics + computeJvmSignatureDiagnostics(info)
-        }
-
         val diagnosticsPerFile = allDiagnostics.groupBy { it.psiFile }
         val withNewInferenceModeEnabled = testServices.withNewInferenceModeEnabled()
         val configuration = reporter.createConfiguration(module)
@@ -76,26 +65,6 @@ class ClassicDiagnosticsHandler(testServices: TestServices) : ClassicFrontendAna
         }
     }
 
-    private fun computeJvmSignatureDiagnostics(info: ClassicFrontendOutputArtifact): Set<Diagnostic> {
-        if (testServices.moduleStructure.modules.any { !it.targetPlatform.isJvm() }) return emptySet()
-        if (REPORT_JVM_DIAGNOSTICS_ON_FRONTEND !in testServices.moduleStructure.allDirectives) return emptySet()
-        val bindingContext = info.analysisResult.bindingContext
-        val jvmSignatureDiagnostics = HashSet<Diagnostic>()
-        for (ktFile in info.ktFiles.values) {
-            val declarations = PsiTreeUtil.findChildrenOfType(ktFile, KtDeclaration::class.java)
-            for (declaration in declarations) {
-                val diagnostics = getJvmSignatureDiagnostics(
-                    declaration,
-                    bindingContext.diagnostics,
-                ) ?: continue
-
-                jvmSignatureDiagnostics.addAll(diagnostics.forElement(declaration))
-            }
-        }
-        return jvmSignatureDiagnostics
-    }
-
-
     private fun processDebugInfoDiagnostics(
         configuration: DiagnosticsRenderingConfiguration,
         module: TestModule,

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/runners/AbstractDiagnosticTest.kt

@@ -14,7 +14,6 @@ import org.jetbrains.kotlin.test.builders.classicFrontendStep
 import org.jetbrains.kotlin.test.directives.ConfigurationDirectives.WITH_STDLIB
 import org.jetbrains.kotlin.test.directives.DiagnosticsDirectives.CHECK_COMPILE_TIME_VALUES
 import org.jetbrains.kotlin.test.directives.DiagnosticsDirectives.DIAGNOSTICS
-import org.jetbrains.kotlin.test.directives.DiagnosticsDirectives.REPORT_JVM_DIAGNOSTICS_ON_FRONTEND
 import org.jetbrains.kotlin.test.directives.JvmEnvironmentConfigurationDirectives.JDK_KIND
 import org.jetbrains.kotlin.test.directives.JvmEnvironmentConfigurationDirectives.USE_PSI_CLASS_FILES_READING
 import org.jetbrains.kotlin.test.directives.JvmEnvironmentConfigurationDirectives.WITH_REFLECT
@@ -56,7 +55,6 @@ abstract class AbstractDiagnosticTest : AbstractKotlinCompilerTest() {
 
         defaultDirectives {
             +USE_PSI_CLASS_FILES_READING
-            +REPORT_JVM_DIAGNOSTICS_ON_FRONTEND
         }
 
         enableMetaInfoHandler()

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/runners/AbstractForeignAnnotationsTest.kt

@@ -12,7 +12,6 @@ import org.jetbrains.kotlin.test.builders.TestConfigurationBuilder
 import org.jetbrains.kotlin.test.builders.classicFrontendHandlersStep
 import org.jetbrains.kotlin.test.builders.classicFrontendStep
 import org.jetbrains.kotlin.test.builders.configureClassicFrontendHandlersStep
-import org.jetbrains.kotlin.test.directives.DiagnosticsDirectives.REPORT_JVM_DIAGNOSTICS_ON_FRONTEND
 import org.jetbrains.kotlin.test.directives.DiagnosticsDirectives.SKIP_TXT
 import org.jetbrains.kotlin.test.directives.ForeignAnnotationsDirectives.ANNOTATIONS_PATH
 import org.jetbrains.kotlin.test.directives.JvmEnvironmentConfigurationDirectives.ALL_JAVA_AS_BINARY
@@ -26,7 +25,6 @@ import org.jetbrains.kotlin.test.model.DependencyKind
 import org.jetbrains.kotlin.test.model.FrontendKinds
 import org.jetbrains.kotlin.test.preprocessors.ExternalAnnotationsSourcePreprocessor
 import org.jetbrains.kotlin.test.preprocessors.JspecifyMarksCleanupPreprocessor
-import org.jetbrains.kotlin.test.services.SourceFilePreprocessor
 import org.jetbrains.kotlin.test.services.TestServices
 import org.jetbrains.kotlin.test.services.configuration.*
 import org.jetbrains.kotlin.test.services.jvm.ForeignAnnotationAgainstCompiledJavaTestSuppressor
@@ -48,7 +46,6 @@ abstract class AbstractForeignAnnotationsTestBase(private val kind: ForeignAnnot
         }
 
         defaultDirectives {
-            +REPORT_JVM_DIAGNOSTICS_ON_FRONTEND
             +WITH_FOREIGN_ANNOTATIONS
             if (kind.compiledJava) {
                 +ALL_JAVA_AS_BINARY

plugins/parcelize/parcelize-compiler/tests/org/jetbrains/kotlin/parcelize/test/runners/AbstractParcelizeDiagnosticTest.kt

@@ -11,7 +11,6 @@ import org.jetbrains.kotlin.test.builders.TestConfigurationBuilder
 import org.jetbrains.kotlin.test.builders.classicFrontendHandlersStep
 import org.jetbrains.kotlin.test.builders.classicFrontendStep
 import org.jetbrains.kotlin.test.directives.DiagnosticsDirectives.DIAGNOSTICS
-import org.jetbrains.kotlin.test.directives.DiagnosticsDirectives.REPORT_JVM_DIAGNOSTICS_ON_FRONTEND
 import org.jetbrains.kotlin.test.directives.JvmEnvironmentConfigurationDirectives.USE_PSI_CLASS_FILES_READING
 import org.jetbrains.kotlin.test.frontend.classic.ClassicFrontendFailingTestSuppressor
 import org.jetbrains.kotlin.test.frontend.classic.handlers.ClassicDiagnosticsHandler
@@ -32,7 +31,6 @@ abstract class AbstractParcelizeDiagnosticTest : AbstractKotlinCompilerTest() {
 
         defaultDirectives {
             +USE_PSI_CLASS_FILES_READING
-            +REPORT_JVM_DIAGNOSTICS_ON_FRONTEND
             DIAGNOSTICS with listOf("-UNUSED_PARAMETER", "-PRE_RELEASE_CLASS")
         }