Improve logging of problems during db connection

[kamil-holubicki]

Some error logs indicate only the error returned by the server without
the information about the server identity itself.
On the other hand, there are also logs which display the server identity
together with the returned error.

Example:

2022-03-30T08:59:22.718093+02:00 orchestrator123.prod.com orchestrator[39052]: 2022-03-30 08:59:22 ERROR Error 3884: Storage engine could not allocate temporary tablespace for this session.

There is no way to identify which MySql server causes problems.

On the other hand sometimes there are logs which provide full context:

2022-03-30T09:49:03.634230+02:00 orchestrator123prod.com orchestrator[39052]: 2022-03-30 09:49:03 ERROR ReadTopologyInstance(mysqlserver-321.prod.com:3306) show global status like 'Uptime': Error 3884: Storage engine could not allocate temporary tablespace for this session.

Error logs should be consistent.