Yaroslav Shumakov

Since ddl 1.6.0 and crud 0.11.0+ needs _ddl_sharding_func space need to add analogue of utils.register_sharding_key(): utils.register_sharding_func() https://github.com/tarantool/migrations/blob/d597604cb2658350787c09f4855141d7da29c18f/migrator/utils.lua#L28