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

kotlin-native/backend.native/tests/codegen/innerClass/inheritance3_linkTest_lib.kt

@@ -0,0 +1,14 @@
+/*
+ * 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.
+ */
+
+open class Outer {
+    open inner class Inner1
+    inner class Middle {
+        inner class Inner2 : Inner1() {
+            fun getOuter() = this@Outer
+            fun getMiddle() = this@Middle
+        }
+    }
+}