Backport #18499
* Correct use `UserID` in `SearchTeams`
- Use `UserID` in the `SearchTeams` function, currently it was useless
to pass such information. Now it does a INNER statement to `team_user`
which obtains UserID -> TeamID data.
- Make OrgID optional.
- Resolves#18484
* Seperate searching specific user
* Add condition back
* Use correct struct type
Co-authored-by: Gusted <williamzijl7@hotmail.com>
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
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