[AA] Allow specifying REx file contents in testdata.

Tests can now specify the code generated by a resolve extension from
within the test's testdata. Module-level directives control whether
resolve extensions are enabled for that module, as well as package names
and source shadowing regexes. File-level directives allow a `// FILE:`
block within the testdata to be converted into a KtResolveExtensionFile
and removed from the module as a whole. (This requires a new
`ModuleStructureTransformer`, because we need to be able to entirely
remove the files in question.)

Any test can add support for these directives by calling
`KtResolveExtensionTestSupport.configure` from within their
`configureTest` stanza. This allows this functionality to be used in
conjuction with any test base class.

^KT-59329

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/builders/TestConfigurationBuilder.kt

@@ -32,7 +32,7 @@ class TestConfigurationBuilder {
     private val preAnalysisHandlers: MutableList<Constructor<PreAnalysisHandler>> = mutableListOf()
 
     private val additionalSourceProviders: MutableList<Constructor<AdditionalSourceProvider>> = mutableListOf()
-    private val moduleStructureTransformers: MutableList<ModuleStructureTransformer> = mutableListOf()
+    private val moduleStructureTransformers: MutableList<Constructor<ModuleStructureTransformer>> = mutableListOf()
 
     private val metaTestConfigurators: MutableList<Constructor<MetaTestConfigurator>> = mutableListOf()
     private val afterAnalysisCheckers: MutableList<Constructor<AfterAnalysisChecker>> = mutableListOf()
@@ -180,6 +180,13 @@ class TestConfigurationBuilder {
 
     @TestInfrastructureInternals
     fun useModuleStructureTransformers(vararg transformers: ModuleStructureTransformer) {
+        for (transformer in transformers) {
+            moduleStructureTransformers += { _ -> transformer }
+        }
+    }
+
+    @TestInfrastructureInternals
+    fun useModuleStructureTransformers(vararg transformers: Constructor<ModuleStructureTransformer>) {
         moduleStructureTransformers += transformers
     }
 
@@ -265,7 +272,7 @@ class TestConfigurationBuilder {
             get() = builder.preAnalysisHandlers
         val additionalSourceProviders: List<Constructor<AdditionalSourceProvider>>
             get() = builder.additionalSourceProviders
-        val moduleStructureTransformers: List<ModuleStructureTransformer>
+        val moduleStructureTransformers: List<Constructor<ModuleStructureTransformer>>
             get() = builder.moduleStructureTransformers
         val metaTestConfigurators: List<Constructor<MetaTestConfigurator>>
             get() = builder.metaTestConfigurators

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/impl/TestConfigurationImpl.kt

@@ -34,7 +34,7 @@ class TestConfigurationImpl(
 
     additionalSourceProviders: List<Constructor<AdditionalSourceProvider>>,
     preAnalysisHandlers: List<Constructor<PreAnalysisHandler>>,
-    moduleStructureTransformers: List<ModuleStructureTransformer>,
+    moduleStructureTransformers: List<Constructor<ModuleStructureTransformer>>,
     metaTestConfigurators: List<Constructor<MetaTestConfigurator>>,
     afterAnalysisCheckers: List<Constructor<AfterAnalysisChecker>>,
 
@@ -83,7 +83,7 @@ class TestConfigurationImpl(
         additionalSourceProviders
             .map { it.invoke(testServices) }
             .also { it.registerDirectivesAndServices() },
-        moduleStructureTransformers,
+        moduleStructureTransformers.map { it(testServices) },
         this.environmentConfigurators
     )