[K/N] Supported outer this references from cached inline bodies

kotlin-native/backend.native/tests/codegen/innerClass/inheritance2_linkTest_main.kt

@@ -0,0 +1,9 @@
+/*
+ * Copyright 2010-2021 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the LICENSE file.
+ */
+
+fun main() {
+    val o = Outer(42).Middle(117).Inner2()
+    println(o.foo())
+}