Use InitWorkPathAndCfgProvider for environment-to-ini to avoid unnecessary checks...

Use InitWorkPathAndCfgProvider for environment-to-ini to avoid unnecessary checks (#25480) (#25488)

Backport #25480 by @wxiaoguang

Fix #25481

The `InitWorkPathAndCommonConfig` calls `LoadCommonSettings` which does
many checks like "current user is root or not".

Some commands like "environment-to-ini" shouldn't do such check, because
it might be run with "root" user at the moment (eg: the docker's setup
script)

ps: in the future, the docker's setup script should be improved to avoid
Gitea's command running with "root"

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>