Merge branch 'ag/441795-banner-when-all-seats-used' into 'master'

Show banner when all seats used

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/145922



Merged-by: Olena Horal-Koretska <ohoralkoretska@gitlab.com>
Approved-by: Tim Noah <tnoah@gitlab.com>
Approved-by: mo khan <mo@mokhan.ca>
Approved-by: Nataliia Radina <nradina@gitlab.com>
Approved-by: Leaminn Ma <lma@gitlab.com>
Approved-by: Olena Horal-Koretska <ohoralkoretska@gitlab.com>
Reviewed-by: Olena Horal-Koretska <ohoralkoretska@gitlab.com>
Reviewed-by: Angelo Gulina <agulina@gitlab.com>
Reviewed-by: Nataliia Radina <nradina@gitlab.com>
Reviewed-by: Leaminn Ma <lma@gitlab.com>
Reviewed-by: mo khan <mo@mokhan.ca>
Co-authored-by: Leaminn Ma <lma@gitlab.com>
Co-authored-by: Angelo Gulina <agulina@gitlab.com>