types: fix type merge about bit type (#23857)#24026

Merged

ti-chi-bot merged 6 commits intopingcap:release-4.0from ti-srebot:release-4.0-a9a579575965

May 10, 2021

+54-45

Commits on Apr 14, 2021

cherry pick pingcap#23857 to release-4.0

lzmhhh123
authored and
ti-srebot
committed

Commits on May 8, 2021

Commits on May 10, 2021