Merge branch '410003-add-achievement-ui' into 'master'

Add achievements UI

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/129370



Merged-by: Phil Hughes <me@iamphill.com>
Approved-by: Alex Pennells <apennells@gitlab.com>
Approved-by: Tim Noah <tnoah@gitlab.com>
Approved-by: Phil Hughes <me@iamphill.com>
Reviewed-by: Phil Hughes <me@iamphill.com>
Reviewed-by: Alex Pennells <apennells@gitlab.com>
Reviewed-by: Lee Tickett <ltickett@gitlab.com>
Co-authored-by: Lee Tickett <ltickett@gitlab.com>