KT-12152 : constructor consistency: handle open property accessing

compiler/testData/diagnostics/tests/constructorConsistency/openProperty.kt

@@ -0,0 +1,14 @@
+open class Base {
+    open var x: Int
+
+    open var y: Int
+
+    constructor() {
+        <!DEBUG_INFO_LEAKING_THIS!>x<!> = 42
+        this.<!DEBUG_INFO_LEAKING_THIS!>y<!> = 24
+        val temp = this.<!DEBUG_INFO_LEAKING_THIS!>x<!>
+        this.<!DEBUG_INFO_LEAKING_THIS!>x<!> = <!DEBUG_INFO_LEAKING_THIS!>y<!>
+        <!DEBUG_INFO_LEAKING_THIS!>y<!> = temp
+
+    }
+}