vtgate: set ServerStatusAutocommit in handshake status flags#19628

arthurschreiber merged 2 commits intovitessio:mainvitessio/vitess:mainfrom

lizztheblizz:fix-vtgate-handshake-autocommit-statuslizztheblizz/vitess:fix-vtgate-handshake-autocommit-statusCopy head branch name to clipboard