[BUG] Support new row format of TiDB/TiKV

TiDB/TiKV used a new row format. TiSpark should support it.

RFC: https://github.com/pingcap/tidb/blob/master/docs/design/2018-07-19-row-format.md

Relating PRs:
https://github.com/pingcap/tidb/pull/7597 
https://github.com/pingcap/tidb/pull/12634