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/firProblems/lambdaInEnumEntryConstructorCall.kt

@@ -1,6 +1,4 @@
 // WITH_STDLIB
-// IGNORE_BACKEND: JS_IR NATIVE
-// ^ KT-61141: absent enum fake_overrides: finalize, getDeclaringClass, clone
 
 class Wrapper(var baseUrl: String)