Allow rubocop exception for CurrentSettings

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/168375



Merged-by: Peter Leitzen <pleitzen@gitlab.com>
Approved-by: Adam Hegyi <ahegyi@gitlab.com>
Approved-by: Peter Leitzen <pleitzen@gitlab.com>
Co-authored-by: Rutger Wessels <rwessels@gitlab.com>