add LOCAL_DB_SSL_VERIFY for Supporting TiDB serverless

[Weaxs]

Description

LOCAL_DB_HOST=xxxx.aws.tidbcloud.com
LOCAL_DB_TYPE=mysql
LOCAL_DB_NAME=dbgpt
LOCAL_DB_PORT=4000
LOCAL_DB_USER=xxx.root
LOCAL_DB_PASSWORD=xxxxxx
LOCAL_DB_SSL_VERIFY=True

How Has This Been Tested?

use tidb serverless test

Snapshots:

Include snapshots for easier review.

Checklist:

• My code follows the style guidelines of this project
• I have already rebased the commits and make the commit message conform to the project standard.
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• Any dependent changes have been merged and published in downstream modules

[Aries-ckt]

r+

[csunny]

LGTM