KT-12152: quick fix "make final" for member / containing class

idea/testData/quickfix/leakingThis/accessOverriddenProperty.kt

@@ -0,0 +1,10 @@
+// "Make 'x' final" "false"
+// ACTION: Convert property initializer to getter
+
+open class My(open val x: Int) {
+    val y = <caret>x
+}
+
+class Your(x : Int) : My(x) {
+    override val x: Int get() = 42
+}