FE 1.0: implement initial label resolve warning for KT-51433

compiler/testData/diagnostics/tests/labels/labeledFunctionLiteral.kt

@@ -12,6 +12,6 @@ fun test() {
 
 fun lambda() {
     val funLit = lambda@ fun String.(): String {
-        return <!NO_THIS!>this@lambda<!>
+        return <!NO_THIS!>this<!LABEL_RESOLVE_WILL_CHANGE!>@lambda<!><!>
     }
-}
+}