[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

analysis/analysis-api/testData/resolveExtensions/referenceResolve/multiModule/extendedModuleDependency/classMember.kt

@@ -0,0 +1,29 @@
+// MODULE: extendedModule
+// WITH_RESOLVE_EXTENSION
+// RESOLVE_EXTENSION_PACKAGE: generated
+
+// FILE: resolve1.kt
+// RESOLVE_EXTENSION_FILE
+package generated
+
+// RESOLVE_EXTENSION_CLASSIFIER: GeneratedClass1
+class GeneratedClass1
+
+// FILE: resolve2.kt
+// RESOLVE_EXTENSION_FILE
+package generated
+
+// RESOLVE_EXTENSION_CLASSIFIER: GeneratedClass2
+class GeneratedClass2() {
+    fun generatedClassMember2(): GeneratedClass1 = TODO()
+}
+
+// MODULE: dependency2
+
+// MODULE: main(extendedModule, dependency2)()()
+import generated.*
+
+fun main() {
+    val a = GeneratedClass2()
+    a.gener<caret>atedClassMember2()
+}

analysis/analysis-api/testData/resolveExtensions/referenceResolve/multiModule/extendedModuleDependency/classMember.txt

@@ -0,0 +1,2 @@
+Resolved to:
+0: (in generated.GeneratedClass2) fun generatedClassMember2(): generated.GeneratedClass1

analysis/analysis-api/testData/resolveExtensions/referenceResolve/multiModule/extendedModuleDependency/extensionFunction.kt

@@ -0,0 +1,19 @@
+// MODULE: extendedModule
+// WITH_RESOLVE_EXTENSION
+// RESOLVE_EXTENSION_PACKAGE: generated
+
+// FILE: extension.kt
+// RESOLVE_EXTENSION_FILE
+package generated
+
+// RESOLVE_EXTENSION_CALLABLE: generatedTopLevelExtensionFunction1
+fun String.generatedTopLevelExtensionFunction1(boolean: Boolean): Int
+
+// MODULE: dependency2
+
+// MODULE: main(extendedModule, dependency2)()()
+import generated.*
+
+fun main() {
+    "string".generatedTopLeve<caret>lExtensionFunction1(true)
+}

analysis/analysis-api/testData/resolveExtensions/referenceResolve/multiModule/extendedModuleDependency/extensionFunction.txt

@@ -0,0 +1,2 @@
+Resolved to:
+0: (in generated) fun kotlin.String.generatedTopLevelExtensionFunction1(boolean: kotlin.Boolean): kotlin.Int

analysis/analysis-api/testData/resolveExtensions/referenceResolve/multiModule/extendedModuleDependency/shadowedDeclaration.kt

@@ -0,0 +1,19 @@
+// UNRESOLVED_REFERENCE
+
+// MODULE: extendedModule
+// WITH_RESOLVE_EXTENSION
+// RESOLVE_EXTENSION_PACKAGE: generated
+// RESOLVE_EXTENSION_SHADOWED: \.hidden\.kt$
+
+// FILE: declarations.hidden.kt
+package foo
+
+fun bar() = "baz"
+
+// MODULE: dependency2
+
+// MODULE: main(extendedModule, dependency2)()()
+// FILE: main.kt
+fun main() {
+    val x = foo.<caret>bar()
+}

analysis/analysis-api/testData/resolveExtensions/referenceResolve/multiModule/extendedModuleDependency/shadowedJava.kt

@@ -0,0 +1,23 @@
+// UNRESOLVED_REFERENCE
+
+// MODULE: extendedModule
+// WITH_RESOLVE_EXTENSION
+// RESOLVE_EXTENSION_PACKAGE: generated
+// RESOLVE_EXTENSION_SHADOWED: \.hidden\.[a-z]+$
+
+// FILE: TestClass.hidden.java
+package foo;
+
+public class TestClass {
+    public TestClass() {}
+}
+
+// MODULE: dependency2
+
+// MODULE: main(extendedModule, dependency2)()()
+// FILE: main.kt
+package foo
+
+fun main() {
+    val x = <caret>TestClass()
+}

analysis/analysis-api/testData/resolveExtensions/referenceResolve/multiModule/extendedModuleDependency/shadowedOverload.kt

@@ -0,0 +1,26 @@
+// MODULE: extendedModule
+// WITH_RESOLVE_EXTENSION
+// RESOLVE_EXTENSION_PACKAGE: generated
+// RESOLVE_EXTENSION_SHADOWED: \.hidden\.kt$
+
+// FILE: extension.kt
+// RESOLVE_EXTENSION_FILE
+package generated
+
+// RESOLVE_EXTENSION_CALLABLE: generatedOverloadedExtensionFunction
+fun Any.generatedOverloadedExtensionFunction(): Int = TODO()
+
+// FILE: generated.hidden.kt
+package generated
+
+fun String.generatedOverloadedExtensionFunction(): Int = TODO()
+
+// MODULE: dependency2
+
+// MODULE: main(extendedModule, dependency2)()()
+// FILE: main.kt
+import generated.*
+
+fun main() {
+    "string".generatedOverloadedExtension<caret>Function()
+}

analysis/analysis-api/testData/resolveExtensions/referenceResolve/multiModule/extendedModuleDependency/shadowedOverload.txt

@@ -0,0 +1,2 @@
+Resolved to:
+0: (in generated) fun kotlin.Any.generatedOverloadedExtensionFunction(): kotlin.Int

analysis/analysis-api/testData/resolveExtensions/referenceResolve/multiModule/extendedModuleDependency/topLevelFunction.kt

@@ -0,0 +1,31 @@
+// MODULE: extendedModule
+// WITH_RESOLVE_EXTENSION
+// RESOLVE_EXTENSION_PACKAGE: generated
+
+// FILE: extension.kt
+// RESOLVE_EXTENSION_FILE
+package generated
+
+// RESOLVE_EXTENSION_CLASSIFIER: GeneratedClass1
+class GeneratedClass1
+
+// RESOLVE_EXTENSION_CALLABLE: generatedTopLevelFunction1
+fun generatedTopLevelFunction1(): GeneratedClass2
+
+// FILE: extension2.kt
+// RESOLVE_EXTENSION_FILE
+package generated
+
+// RESOLVE_EXTENSION_CLASSIFIER: GeneratedClass2
+class GeneratedClass2 {
+    fun generatedClassMember2(): GeneratedClass1
+}
+
+// MODULE: dependency2
+
+// MODULE: main(extendedModule, dependency2)()()
+import generated.*
+
+fun main() {
+    generatedTopLevelFunc<caret>tion1()
+}

analysis/analysis-api/testData/resolveExtensions/referenceResolve/multiModule/extendedModuleDependency/topLevelFunction.txt

@@ -0,0 +1,2 @@
+Resolved to:
+0: (in generated) fun generatedTopLevelFunction1(): generated.GeneratedClass2