Do not freeze enum in new MM

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/EnumClassLowering.kt

@@ -303,9 +303,6 @@ internal class EnumClassLowering(val context: Context) : FileLoweringPass {
                         else -> error("Unexpected initializer: $initializer")
                     }
                 }
-                +irCall(this@EnumClassLowering.context.ir.symbols.freeze, listOf(arrayType)).apply {
-                    extensionReceiver = irGet(receiver)
-                }
             }
             (constructor.body as IrBlockBody).statements += valuesInitializer
         }

kotlin-native/backend.native/tests/build.gradle

@@ -1173,7 +1173,7 @@ task enum_nested(type: KonanLocalTest) {
 }
 
 task enum_isFrozen(type: KonanLocalTest) {
-    goldValue = "true\n"
+    goldValue = isExperimentalMM ? "false\n" : "true\n"
     source = "codegen/enum/isFrozen.kt"
 }