Fix repo avatar conflict (#32958) (#32960)

Backport #32958 by wxiaoguang

Continue even if the avatar deleting fails

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

services/repository/delete.go

@@ -324,7 +324,8 @@ func DeleteRepositoryDirectly(ctx context.Context, doer *user_model.User, repoID
 
 	if len(repo.Avatar) > 0 {
 		if err := storage.RepoAvatars.Delete(repo.CustomAvatarRelativePath()); err != nil {
-			return fmt.Errorf("Failed to remove %s: %w", repo.Avatar, err)
+			log.Error("remove avatar file %q: %v", repo.CustomAvatarRelativePath(), err)
+			// go on
 		}
 	}