Make git.OpenRepository accept Context (#19260)

* OpenRepositoryCtx -> OpenRepository
* OpenRepository -> openRepositoryWithDefaultContext, only for internal usage

modules/indexer/stats/db.go

@@ -35,7 +35,7 @@ func (db *DBIndexer) Index(id int64) error {
 		return err
 	}
 
-	gitRepo, err := git.OpenRepositoryCtx(ctx, repo.RepoPath())
+	gitRepo, err := git.OpenRepository(ctx, repo.RepoPath())
 	if err != nil {
 		if err.Error() == "no such file or directory" {
 			return nil