Introduce inspection detecting self-assignment of properties

So #KT-20714 Fixed

idea/testData/inspectionsLocal/selfAssignment/propertyHasDelegate.kt

@@ -0,0 +1,20 @@
+// PROBLEM: none
+// WITH_RUNTIME
+
+import kotlin.properties.ReadWriteProperty
+import kotlin.reflect.KProperty
+
+class Test {
+    var foo: Int by Delegate()
+
+    fun test() {
+        foo = <caret>foo
+    }
+}
+
+class Delegate : ReadWriteProperty<Test, Int> {
+    override fun getValue(thisRef: Test, property: KProperty<*>): Int = 1
+    override fun setValue(thisRef: Test, property: KProperty<*>, value: Int) {
+        println()
+    }
+}