fix(settings): Fix infinitely loading account management page with pagination of groups

[Pytal]

Summary

• Fix [Bug]: Administrative Account Page hangs when having many (ldap-)groups #50067

With a large number of groups, e.g. >=10,000, the compute load on the server and client becomes excessive. On the server all groups are pre-computed in-memory resulting in increased response latency and excessive payload size. As a result the page loads indefinitely and becomes unresponsive.

To Do

• Paginate groups
• Search for groups
• Remove unnecessary and expensive pre-computation of entire groups list on the server every page load
  • For 10,000 groups, server compute time is reduced by 5s
• Allow searching for groups when editing accounts or creating a new account
• Defer loading details of a user’s groups
• Adapt all logic dependent on having entire groups list in-memory for paginated groups list

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)

[Pytal]

/compile

[Pytal]

/backport to stable31

[Pytal]

/backport to stable30

[come-nc]

/backport to stable30

[solracsf]

This PR is causing issues in groups display names: #52130

[provokateurin]

@solracsf please do it the other way around and mention the PR in the issue and avoid bumping merged PRs.