Merge branch '495155-use-users-count-for-roles-and-permissions-table-2' into 'master'

Add and show users count for roles and permissions table

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/167514



Merged-by: Gregory Havenga <11164960-ghavenga@users.noreply.gitlab.com>
Approved-by: Angelo Gulina <agulina@gitlab.com>
Approved-by: mo khan <mo@mokhan.ca>
Approved-by: Gregory Havenga <11164960-ghavenga@users.noreply.gitlab.com>
Reviewed-by: Rémy Coutable <remy@rymai.me>
Reviewed-by: Doug Stull <dstull@gitlab.com>
Reviewed-by: Angelo Gulina <agulina@gitlab.com>
Reviewed-by: Ian Anderson <ianderson@gitlab.com>
Reviewed-by: mo khan <mo@mokhan.ca>
Co-authored-by: Daniel Tian <dtian@gitlab.com>