How to support multi db types in seata-server side while using the StoreMode of 'db'

## Why you need it?
Is your feature request related to a problem? Please describe in details
Now Seata only support three db types in server side while using db store mode , while if the environment can not provide the required type of db, the server will not work normally.

I want to use a scalable and low modification cost way to solve this problem, in which the developer will not need to provide new SQL log for the specific DB.

Moreover, the solution should not reduce the performence of the Seata-Server and should not increase the learn cost for the user.