Introduction of CastedClassReceiver and its handling in codegen #KT-6744 Fixed

ClassReceiver converted to Kotlin
Also #KT-7617 Fixed

compiler/testData/codegen/bytecodeText/falseSmartCast.kt

@@ -0,0 +1,15 @@
+open class SuperFoo {
+    public fun bar() {
+        if (this is Foo) {
+            baz()
+        }
+    }
+
+    public fun baz() {}
+}
+
+class Foo : SuperFoo() 
+
+// 0 INVOKEVIRTUAL SuperFoo.baz
+// 1 CHECKCAST Foo
+// 1 INVOKEVIRTUAL Foo.baz