IR text tests: Unmute enum class-related tests

Making enum class-related tests unmuted requires implementing
a special "compatibility" mode for IR tree dumper to filter out
fake override declarations leaking from java.enum.Enum and
kotlin.Enum (JVM-only) classes.

compiler/testData/ir/irText/expressions/enumEntryReferenceFromEnumEntryClass.kt

@@ -1,11 +1,6 @@
-// IGNORE_BACKEND: JS_IR
-
 // SKIP_SIGNATURE_DUMP
 // ^ Types of properties of anonymous classes generated by K1 and K2 are different
 
-// KT-61141: absent enum fake_overrides: finalize, getDeclaringClass, clone
-// IGNORE_BACKEND: NATIVE
-
 enum class MyEnum {
     Z {
         var counter = 0