Tests: do not report backend diagnostics if there's frontend error

In most affected tests, the backend diagnostic such as "conflicting JVM
signature" or "accidental override" is directly caused by some already
existing error reported by frontend, so it doesn't make sense to check
backend diagnostics there.

Tests where that was not the case were moved/copied to
`testsWithJvmBackend`.

analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosticCompilerTestFE10TestdataTestGenerated.java

@@ -44908,12 +44908,6 @@ public class DiagnosticCompilerTestFE10TestdataTestGenerated extends AbstractDia
         runTest("compiler/testData/diagnostics/testsWithStdLib/duplicateJvmSignature/jvmNames.kt");
       }
 
-      @Test
-      @TestMetadata("jvmNamesDuplicate.kt")
-      public void testJvmNamesDuplicate() {
-        runTest("compiler/testData/diagnostics/testsWithStdLib/duplicateJvmSignature/jvmNamesDuplicate.kt");
-      }
-
       @Test
       @TestMetadata("jvmOverloads.kt")
       public void testJvmOverloads() {

analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/LLFirPreresolvedReversedDiagnosticCompilerFE10TestDataTestGenerated.java

@@ -44908,12 +44908,6 @@ public class LLFirPreresolvedReversedDiagnosticCompilerFE10TestDataTestGenerated
         runTest("compiler/testData/diagnostics/testsWithStdLib/duplicateJvmSignature/jvmNames.kt");
       }
 
-      @Test
-      @TestMetadata("jvmNamesDuplicate.kt")
-      public void testJvmNamesDuplicate() {
-        runTest("compiler/testData/diagnostics/testsWithStdLib/duplicateJvmSignature/jvmNamesDuplicate.kt");
-      }
-
       @Test
       @TestMetadata("jvmOverloads.kt")
       public void testJvmOverloads() {