Convert parameter <-> receiver intention: do not add label to 'this' if not needed

#KT-17615 Fixed
#KT-30028 Fixed
#KT-32809 Fixed
#KT-28085 Fixed
#KT-37508 Fixed

Convert receiver to parameter:

#KT-37508 Fixed

idea/testData/intentions/convertParameterToReceiver/explicitThis.kt

@@ -0,0 +1,8 @@
+class A
+
+class B {
+    val foo = 1
+    fun test(<caret>a: A) {
+        this.foo
+    }
+}