feat: add abort signals when listing users/groups

[JammingBen]

Description

As per title. This allows those requests to be cancelled when a task is being cancelled/restarted.

Related Issue

• Fixes https://github.com/owncloud/web/issues/6517

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Technical debt
• [ ] Tests
• [ ] Documentation
• [ ] Maintenance (e.g. dependency updates or tooling)

[update-docs[bot]]

Thanks for opening this pull request! The maintainers of this repository would appreciate it if you would create a changelog item based on your changes.

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud