Merge branch 'fix-master-job-token-signing-key' into 'master'

Fix master due to ApplicationSetting stubbed attribute

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/173635



Merged-by: Stan Hu <stanhu@gmail.com>
Approved-by: Stan Hu <stanhu@gmail.com>
Co-authored-by: Fabio Pitino <fpitino@gitlab.com>