[Tests] Add tests for additional stub info in .knm files

KTIJ-28668

analysis/decompiled/decompiler-to-file-stubs/testData/additionalClsStubInfo/AnnotatedFlexibleTypes/AnnotatedFlexibleTypes.kt

@@ -1,3 +1,6 @@
+/* Java interop */
+// KNM_K2_IGNORE
+
 package test
 
 public class AnnotatedFlexibleTypes(val javaClass: d.JavaClass) {

analysis/decompiled/decompiler-to-file-stubs/testData/additionalClsStubInfo/AnnotationValues/AnnotationValues.kt

@@ -1,3 +1,7 @@
+/* K2 is skipped because of the test data: multiple KNM parts are produced */
+// KNM_K2_IGNORE
+
+
 package test
 
 import test.E.E1

analysis/decompiled/decompiler-to-file-stubs/testData/additionalClsStubInfo/Contracts/Contracts.kt

@@ -1,3 +1,5 @@
+/* KTIJ-28668 */
+// KNM_K2_IGNORE
 // JVM_FILE_NAME: ContractsKt
 
 @file:OptIn(ExperimentalContracts::class)

analysis/decompiled/decompiler-to-file-stubs/testData/additionalClsStubInfo/OuterClassesWithFlexibleArgs/OuterClassesWithFlexibleArgs.kt

@@ -1,3 +1,6 @@
+/* Java interop */
+// KNM_K2_IGNORE
+
 package test
 
 public class OuterClassesWithFlexibleArgs<K, L>(k: K, l: L) {

analysis/decompiled/decompiler-to-file-stubs/testData/additionalClsStubInfo/PropertyInitializer/PropertyInitializer.kt

@@ -1,3 +1,5 @@
+// KNM_K2_IGNORE
+
 package test
 
 import kotlin.reflect.KClass

analysis/decompiled/decompiler-to-file-stubs/testData/additionalClsStubInfo/TypeParametersInFlexibleTypes/TypeParametersInFlexibleTypes.kt

@@ -1,3 +1,6 @@
+/* Java interop */
+// KNM_K2_IGNORE
+
 package test
 
 public class TypeParametersInFlexibleTypes<A, D>(val javaClass: d.JavaClass<A>, val t: D & Any) {