K2: add bytecode listing tests

#KT-57171 Fixed

compiler/testData/codegen/bytecodeListing/collectionStubs/observableMutableMap.kt

@@ -1,5 +1,8 @@
 // See KT-42033
 
+// IGNORE_BACKEND_K2: JVM_IR
+// FIR status: KT-57268 K2: extra methods `remove` and/or `getOrDefault` are generated for Map subclasses with JDK 1.6 in dependencies
+
 interface ObservableMap<K, V> : Map<K, V>
 
 abstract class ObservableMutableMap<K, V> : ObservableMap<K, V> {
@@ -9,4 +12,4 @@ abstract class ObservableMutableMap<K, V> : ObservableMap<K, V> {
 
     fun putAll(from: Map<out K, V>) {
     }
-}
+}