Fix repo permissions and only sync on demand

[6543]

Instead of pull all permission data of all repos for a user periodicaly, only check and update if needed.

(User request info for a repo ... and permission check is out of sync)

ttl of permission data should be settable too

TODOs:

• [ ] revert #625
• [ ] clarify permission model (currently 3 props pull, push, admin) and public repos currently get pull as fallback instead we should make clear a user has explicit pull request (member of the project) or is just able to see data but is not a member (this would fix some cases where users see repos not owned in their UI)
• [ ] ...

[6543]

will frontport https://github.com/woodpecker-ci/woodpecker/pull/491 ... since milestone changed :/

[6543]

related https://codeberg.org/Codeberg-CI/feedback/issues/66