Merge branch 'cmarais-update-user-permissions-for-artifacts' into 'master'

Clarify artifacts:public effect on reporter role

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/143509



Merged-by: Lysanne Pinto <lpinto@gitlab.com>
Approved-by: Lysanne Pinto <lpinto@gitlab.com>
Co-authored-by: Charl Marais <cmarais@gitlab.com>