Fix missed table name on iterate lfs meta objects (#24768) (#24774)

Backport #24768 by @lunny

Fix #24763

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

models/git/lfs.go

@@ -390,7 +390,7 @@ func IterateLFSMetaObjectsForRepo(ctx context.Context, repoID int64, f func(cont
 
 	for {
 		beans := make([]*CountLFSMetaObject, 0, batchSize)
-		sess := engine.Select("`lfs_meta_object`.*, COUNT(`l1`.oid) AS `count`").
+		sess := engine.Table("lfs_meta_object").Select("`lfs_meta_object`.*, COUNT(`l1`.oid) AS `count`").
 			Join("INNER", "`lfs_meta_object` AS l1", "`lfs_meta_object`.oid = `l1`.oid").
 			Where("`lfs_meta_object`.repository_id = ?", repoID)
 		if !opts.OlderThan.IsZero() {