Merge branch '377530-limit-number-of-users' into 'master'

Autocomplete: Use pagination to limit the number of users returned

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/106149



Merged-by: Sean Arnold <sarnold@gitlab.com>
Approved-by: John Mason <9717668-john-mason@users.noreply.gitlab.com>
Approved-by: Sean Arnold <sarnold@gitlab.com>
Co-authored-by: maddievn <mvanniekerk@gitlab.com>