some refactor about code comments (#20821)

services/pull/pull.go

@@ -240,7 +240,7 @@ func checkForInvalidation(ctx context.Context, requests issues_model.PullRequest
 	}
 	go func() {
 		// FIXME: graceful: We need to tell the manager we're doing something...
-		err := requests.InvalidateCodeComments(ctx, doer, gitRepo, branch)
+		err := InvalidateCodeComments(ctx, requests, doer, gitRepo, branch)
 		if err != nil {
 			log.Error("PullRequestList.InvalidateCodeComments: %v", err)
 		}