[Plugins] Introduce new API for registering compiler plugins

Original `ComponentRegistrar` exposes Project to its registration method,
  so plugins should manually register extensions to it. To prepare for
  possible unbound compiler from Project API in future new  `K2ComponentRegistrar`
  introduced which provides registration method without Project at all

plugins/sam-with-receiver/sam-with-receiver.cli/resources/META-INF/services/org.jetbrains.kotlin.compiler.plugin.CompilerPluginRegistrar

@@ -0,0 +1 @@
+org.jetbrains.kotlin.samWithReceiver.SamWithReceiverComponentRegistrar

plugins/sam-with-receiver/sam-with-receiver.cli/src/org/jetbrains/kotlin/samWithReceiver/SamWithReceiverPlugin.kt

@@ -5,7 +5,6 @@
 
 package org.jetbrains.kotlin.samWithReceiver
 
-import com.intellij.mock.MockProject
 import org.jetbrains.kotlin.compiler.plugin.*
 import org.jetbrains.kotlin.config.CompilerConfiguration
 import org.jetbrains.kotlin.config.CompilerConfigurationKey
@@ -53,17 +52,20 @@ class SamWithReceiverCommandLineProcessor : CommandLineProcessor {
     }
 }
 
-class SamWithReceiverComponentRegistrar : ComponentRegistrar {
-    override fun registerProjectComponents(project: MockProject, configuration: CompilerConfiguration) {
+class SamWithReceiverComponentRegistrar : CompilerPluginRegistrar() {
+    override fun ExtensionStorage.registerExtensions(configuration: CompilerConfiguration) {
         val annotations = configuration.get(ANNOTATION)?.toMutableList() ?: mutableListOf()
         configuration.get(PRESET)?.forEach { preset ->
             SUPPORTED_PRESETS[preset]?.let { annotations += it }
         }
         if (annotations.isEmpty()) return
 
-        StorageComponentContainerContributor.registerExtension(project, CliSamWithReceiverComponentContributor(annotations))
-        FirExtensionRegistrarAdapter.registerExtension(project, FirSamWithReceiverExtensionRegistrar(annotations))
+        StorageComponentContainerContributor.registerExtension(CliSamWithReceiverComponentContributor(annotations))
+        FirExtensionRegistrarAdapter.registerExtension(FirSamWithReceiverExtensionRegistrar(annotations))
     }
+
+    override val supportsK2: Boolean
+        get() = true
 }
 
 class CliSamWithReceiverComponentContributor(val annotations: List<String>) : StorageComponentContainerContributor {

plugins/sam-with-receiver/test/org/jetbrains/kotlin/samWithReceiver/AbstractSamWithReceiverScriptNewDefTest.kt

@@ -5,11 +5,11 @@
 
 package org.jetbrains.kotlin.samWithReceiver
 
-import com.intellij.mock.MockProject
 import org.jetbrains.kotlin.ObsoleteTestInfrastructure
 import org.jetbrains.kotlin.TestsCompilerError
 import org.jetbrains.kotlin.checkers.AbstractDiagnosticsTest
 import org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment
+import org.jetbrains.kotlin.compiler.plugin.registerExtensionsForTest
 import org.jetbrains.kotlin.scripting.compiler.plugin.impl.ScriptJvmCompilerFromEnvironment
 import org.jetbrains.kotlin.scripting.configuration.ScriptingConfigurationKeys
 import org.jetbrains.kotlin.scripting.definitions.ScriptDefinition
@@ -38,7 +38,9 @@ abstract class AbstractSamWithReceiverScriptNewDefTest : AbstractDiagnosticsTest
         val scriptCompiler = ScriptJvmCompilerFromEnvironment(environment)
         val res = scriptCompiler.compile("42".toScriptSource("\$init"), ScriptForSamWithReceiversNewDefCompilationConfiguration)
         Assert.assertTrue(res is ResultWithDiagnostics.Success<*>)
-        SamWithReceiverComponentRegistrar().registerProjectComponents(environment.project as MockProject, environment.configuration)
+        registerExtensionsForTest(environment.project, environment.configuration) {
+            with(SamWithReceiverComponentRegistrar()) { registerExtensions(it) }
+        }
     }
 
     override fun analyzeAndCheck(testDataFile: File, files: List<TestFile>) {

plugins/sam-with-receiver/test/org/jetbrains/kotlin/samWithReceiver/SamWithReceiverTests.kt

@@ -5,7 +5,7 @@
 
 package org.jetbrains.kotlin.samWithReceiver
 
-import com.intellij.openapi.project.Project
+import org.jetbrains.kotlin.compiler.plugin.CompilerPluginRegistrar.ExtensionStorage
 import org.jetbrains.kotlin.config.CompilerConfiguration
 import org.jetbrains.kotlin.extensions.StorageComponentContainerContributor
 import org.jetbrains.kotlin.fir.extensions.FirExtensionRegistrarAdapter
@@ -60,12 +60,11 @@ class SamWithReceiverEnvironmentConfigurator(testServices: TestServices) : Envir
         private val TEST_ANNOTATIONS = listOf("SamWithReceiver")
     }
 
-    override fun registerCompilerExtensions(project: Project, module: TestModule, configuration: CompilerConfiguration) {
-        StorageComponentContainerContributor.registerExtension(
-            project,
-            CliSamWithReceiverComponentContributor(TEST_ANNOTATIONS)
-        )
-
-        FirExtensionRegistrarAdapter.registerExtension(project, FirSamWithReceiverExtensionRegistrar(TEST_ANNOTATIONS))
+    override fun ExtensionStorage.registerCompilerExtensions(
+        module: TestModule,
+        configuration: CompilerConfiguration
+    ) {
+        StorageComponentContainerContributor.registerExtension(CliSamWithReceiverComponentContributor(TEST_ANNOTATIONS))
+        FirExtensionRegistrarAdapter.registerExtension(FirSamWithReceiverExtensionRegistrar(TEST_ANNOTATIONS))
     }
 }