- On editting a team, only update the units if the team isn't the
'Owners' team. Otherwise the 'Owners' team end up having all of their
unit access modes set to 'None'; because the request form doesn't send
over any units, as it's simply not shown in the UI.
- Adds a database inconstency check and fix for the case where the
'Owners' team is affected by this bug.
- Adds unit test.
- Adds integration test.
- Resolves #5528
- Regression of https://github.com/go-gitea/gitea/pull/24012
(cherry picked from commit 9de9034400)
