Merge branch 'fix-achievements-for-private-group' into 'master'

Prevent access to achievements for private groups

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/147319



Merged-by: Smriti Garg <sgarg@gitlab.com>
Approved-by: Jon Jenkins <jjenkins@gitlab.com>
Approved-by: Hinam Mehra <hmehra@gitlab.com>
Approved-by: Smriti Garg <sgarg@gitlab.com>
Reviewed-by: Niklas <mc.taucher2003@gmail.com>
Co-authored-by: Lee Tickett <ltickett@gitlab.com>