Add LDAP test settings command

[come-nc]

• Resolves: Add debug occ command to check that the LDAP group membership is correctly configured #44850

Summary

To help debugging issues related to LDAP configuration, this command shows how Nextcloud sees a specific LDAP user, and if provided an associated group.
This should help debugging situations where group<>member association is not working as expected, and may also help in any situation where LDAP configuration is involved.

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[come-nc]

I’m quite happy with current state, only thing I would like to add is clearing the cache maybe?

[blizzz]

Nifty stuff 🤩 The execute() method is a bit long maybe.

Clearing the cache is useful, but would give it a new command.

[come-nc]

Nifty stuff 🤩 The execute() method is a bit long maybe.

Well yeah but it’s not that easy to break into submethods because there are some early return in there to stop earlier.
The failures could be replaced by Exception throwing but the success are harder to do in a clean way. I will keep it like that to avoid spending too much time on this.

Clearing the cache is useful, but would give it a new command.

I now added a --clearcache option because, especially when used together with --debug-log, it makes a lot of sense to do these tests with a clean cache.