Extract Function: Fix extraction of explicit/implicit invoke()

#KT-8116 Fixed

idea/testData/refactoring/extractFunction/parameters/extractThis/paramWithExtensionInvoke.kt

@@ -0,0 +1,10 @@
+// PARAM_DESCRIPTOR: value-parameter val a: kotlin.String defined in foo
+// PARAM_TYPES: kotlin.String
+
+fun String.invoke() {
+
+}
+
+fun foo(a: String) {
+    <selection>a()</selection>
+}