Introduce inspection detecting self-assignment of properties

So #KT-20714 Fixed

idea/testData/inspectionsLocal/selfAssignment/differentThese.kt

@@ -0,0 +1,12 @@
+// PROBLEM: none
+// WITH_RUNTIME
+
+class Test {
+    var foo = 1
+
+    fun test() {
+        with (Test()) {
+            this@Test.foo = <caret>this.foo // Different receivers
+        }
+    }
+}