[stable30] Add LDAP test settings command

[backportbot]

Backport of #50567

Blocked by #50778

Learn more about backports at https://docs.nextcloud.com/server/stable/go.php?to=developer-backports.

Pull requests involved in these backport:

• 25-01-27 fix(user_ldap): Do not map groups we do not know if they match filter #45364
  • 25-01-27 [stable31] fix(user_ldap): Do not map groups we do not know if they match filter #50481
  • 25-01-28 [stable30] fix(user_ldap): Do not map groups we do not know if they match filter #50480
  • 25-01-28 [stable29] fix(user_ldap): Do not map groups we do not know if they match filter #50500
• 24-09-03 fix(user_ldap): Avoid extra LDAP request when mapping a user for the first time #46114 (merged before stable31)
  • [stable30] fix(user_ldap): Avoid extra LDAP request when mapping a user for the first time #50778

[come-nc]

/backport to stable29

[come-nc]

Needs a backport of #46114 first -> #50778

[max-nextcloud]

Compared the backport and made sure the backport this depends upon is in.

[come-nc]

Tested, works.

[max-nextcloud]

/backport to stable29

[backportbot]

The backport to stable29 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable29
git pull origin stable29

# Create the new backport branch
git checkout -b backport/50691/stable29

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts, resolve them
git cherry-pick bbcb1022 8a394111 779f2934 11ce1008

# Push the cherry pick commit to the remote repository and open a pull request
git push origin backport/50691/stable29

Error: Failed to create pull request: Validation Failed: {"resource":"PullRequest","code":"custom","message":"A pull request already exists for nextcloud:backport/50691/stable29."} - https://docs.github.com/rest/pulls/pulls#create-a-pull-request

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Learn more about backports at https://docs.nextcloud.com/server/stable/go.php?to=developer-backports.