JVM_IR fix override equivalence check for collection stub generation

KT-42043 KT-42033

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

@@ -0,0 +1,12 @@
+// See KT-42033
+
+interface ObservableMap<K, V> : Map<K, V>
+
+abstract class ObservableMutableMap<K, V> : ObservableMap<K, V> {
+    fun put(key: K, value: V): V? = value
+
+    fun remove(key: K): V? = null
+
+    fun putAll(from: Map<out K, V>) {
+    }
+}