[stub builder] generate K2 test output for the testsuite where classfiles are generated by the K2 compiler

The result of k1/k2 should be similar here, the differences should be fixed by KT-60764

analysis/decompiled/decompiler-to-file-stubs/testData/clsFileStubBuilder/InnerClassEnumEntry/InnerClassEnumEntry.k2.txt

@@ -0,0 +1,22 @@
+PsiJetFileStubImpl[package=]
+  PACKAGE_DIRECTIVE
+  IMPORT_LIST
+  CLASS[classId=/InnerClassEnumEntry, fqName=InnerClassEnumEntry, isEnumEntry=false, isInterface=false, isLocal=false, isTopLevel=true, name=InnerClassEnumEntry, superNames=[Enum]]
+    MODIFIER_LIST[enum public final]
+    PRIMARY_CONSTRUCTOR[fqName=null, hasBody=false, isDelegatedCallToThis=false, isExtension=false, isTopLevel=false, name=InnerClassEnumEntry]
+      MODIFIER_LIST[private]
+      VALUE_PARAMETER_LIST
+    SUPER_TYPE_LIST
+      SUPER_TYPE_ENTRY
+        TYPE_REFERENCE
+          USER_TYPE
+            USER_TYPE
+              REFERENCE_EXPRESSION[referencedName=kotlin]
+            REFERENCE_EXPRESSION[referencedName=Enum]
+            TYPE_ARGUMENT_LIST
+              TYPE_PROJECTION[projectionKind=NONE]
+                TYPE_REFERENCE
+                  USER_TYPE
+                    REFERENCE_EXPRESSION[referencedName=InnerClassEnumEntry]
+    CLASS_BODY
+      ENUM_ENTRY[classId=null, fqName=InnerClassEnumEntry.ENTRY, isEnumEntry=true, isInterface=false, isLocal=false, isTopLevel=false, name=ENTRY, superNames=[]]

analysis/decompiled/decompiler-to-file-stubs/testData/clsFileStubBuilder/InnerClassEnumEntry/InnerClassEnumEntry.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 enum class InnerClassEnumEntry {
     ENTRY {
         inner class InnerClass