Merge branch 'ap-reroute-project-members' into 'master'

Use project namespace to retrieve project members

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/105781



Merged-by: Tiger Watson <twatson@gitlab.com>
Approved-by: Roy Zwambag <rzwambag@gitlab.com>
Approved-by: Jon Jenkins <jjenkins@gitlab.com>
Approved-by: Tiger Watson <twatson@gitlab.com>
Reviewed-by: Mayra Cabrera <mcabrera@gitlab.com>
Reviewed-by: Alex Pooley <apooley@gitlab.com>
Reviewed-by: Roy Zwambag <rzwambag@gitlab.com>
Co-authored-by: Alex Pooley <apooley@gitlab.com>