Merge branch '523500-consolidate-ban-and-autoban-service' into 'master'

Refactor Users::AutoBanService to use Users::BanService

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/183608



Merged-by: Fred de Gier <fdegier@gitlab.com>
Approved-by: Shola Quadri <squadri@gitlab.com>
Approved-by: Fred de Gier <fdegier@gitlab.com>
Reviewed-by: Shola Quadri <squadri@gitlab.com>
Co-authored-by: imand3r <ianderson@gitlab.com>