[GITEA] Make pushUpdate error verbose

- Push commits updates are run in a queue and updates can come from less
traceable places such as Git over SSH, therefor add more information
about on which repository the pushUpdate failed.

(cherry picked from commit 89a7d17ee3)

services/repository/push.go

@@ -35,7 +35,9 @@ var pushQueue *queue.WorkerPoolQueue[[]*repo_module.PushUpdateOptions]
 func handler(items ...[]*repo_module.PushUpdateOptions) [][]*repo_module.PushUpdateOptions {
 	for _, opts := range items {
 		if err := pushUpdates(opts); err != nil {
-			log.Error("pushUpdate failed: %v", err)
+			// Username and repository stays the same between items in opts.
+			pushUpdate := opts[0]
+			log.Error("pushUpdate[%s/%s] failed: %v", pushUpdate.RepoUserName, pushUpdate.RepoName, err)
 		}
 	}
 	return nil