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/declarations/annotations/enumEntriesWithAnnotations.kt

@@ -1,11 +1,6 @@
-// IGNORE_BACKEND: JS_IR
-
 // SKIP_SIGNATURE_DUMP
 // ^ Difference in annotations generated by K1 and K2
 
-// KT-61141: absent enum fake_overrides: finalize, getDeclaringClass, clone
-// IGNORE_BACKEND: NATIVE
-
 annotation class TestAnn(val x: String)
 
 enum class TestEnum {