Merge branch 'groups-projects-systemaccess-permissions-table' into 'master'

Improve permissions table by separating by category: User Management, Groups, Projects

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/160917



Merged-by: Marcel Amirault <mamirault@gitlab.com>
Approved-by: Marcel Amirault <mamirault@gitlab.com>
Reviewed-by: Marcel Amirault <mamirault@gitlab.com>
Co-authored-by: Joe Randazzo <jrandazzo@gitlab.com>