Merge branch '503336-remove-default-org-for-auth-specs' into 'master'

Update OAuthController to use `Current.organization` as the default organization parameter

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/172333



Merged-by: Aboobacker MK <akarakath@gitlab.com>
Approved-by: Aboobacker MK <akarakath@gitlab.com>
Approved-by: Bogdan Denkovych <bdenkovych@gitlab.com>
Reviewed-by: David Dieulivol <ddieulivol@gitlab.com>
Reviewed-by: Aboobacker MK <akarakath@gitlab.com>
Reviewed-by: Rutger Wessels <rwessels@gitlab.com>
Co-authored-by: Shane Maglangit <smaglangit@gitlab.com>