fix(restore): append galaxy namespace to type name (#7881)

When restoring from backup taken on version <v21.03, we should append the galaxy namespace to the typename.

(cherry picked from commit 23a60d6)

worker/restore.go

@@ -250,6 +250,7 @@ func loadFromBackup(db *badger.DB, in *loadBackupInput) (uint64, uint64, error)
 					if err := update.Unmarshal(kv.Value); err != nil {
 						return err
 					}
+					update.TypeName = x.GalaxyAttr(update.TypeName)
 					for _, sch := range update.Fields {
 						sch.Predicate = x.GalaxyAttr(sch.Predicate)
 					}