[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/ContextReceiversOnClass/ContextReceiversOnClass.k2.txt

@@ -0,0 +1,18 @@
+PsiJetFileStubImpl[package=]
+  PACKAGE_DIRECTIVE
+  IMPORT_LIST
+  CLASS[classId=/ContextReceiversOnClass, fqName=ContextReceiversOnClass, isEnumEntry=false, isInterface=false, isLocal=false, isTopLevel=true, name=ContextReceiversOnClass, superNames=[]]
+    CONTEXT_RECEIVER_LIST
+      CONTEXT_RECEIVER[label=null]
+        TYPE_REFERENCE
+          USER_TYPE
+            REFERENCE_EXPRESSION[referencedName=A]
+      CONTEXT_RECEIVER[label=null]
+        TYPE_REFERENCE
+          USER_TYPE
+            REFERENCE_EXPRESSION[referencedName=B]
+    MODIFIER_LIST[open private]
+    PRIMARY_CONSTRUCTOR[fqName=null, hasBody=false, isDelegatedCallToThis=false, isExtension=false, isTopLevel=false, name=ContextReceiversOnClass]
+      MODIFIER_LIST[public]
+      VALUE_PARAMETER_LIST
+    CLASS_BODY

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

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // !LANGUAGE: +ContextReceivers
 
 context(A, B)