use impersonating user to access mysql

[yx-keith]

Description

this pr can access mysql or doris using user who access trino, to Complete related permission control

Non-technical explanation

Release notes

( ) This is not user-visible or docs only and no release notes are required. ( ) Release notes are required, please propose a release note for me. ( ) Release notes are required, with the following suggested text:

# Section
* Fix some things. ({issue}`issuenumber`)