Merge branch '443597-nwittstruck-add-oauth-application-secrets-to-api' into 'master'

Admin Token API: Add support for reading OAuth Application Secrets

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/172985



Merged-by: Drew Blessing <drew@gitlab.com>
Approved-by: Aboobacker MK <akarakath@gitlab.com>
Approved-by: Drew Blessing <drew@gitlab.com>
Reviewed-by: Drew Blessing <drew@gitlab.com>
Reviewed-by: GitLab Duo <gitlab-duo@gitlab.com>
Co-authored-by: Nicholas Wittstruck <1494491-nwittstruck@users.noreply.gitlab.com>