Merge branch '478175-fix-graphql-api-edgecase' into 'master'

Fix edge case when trying to access policy approval_settings

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/176098



Merged-by: Andy Schoenen <asoiron@gitlab.com>
Approved-by: Andy Schoenen <asoiron@gitlab.com>
Co-authored-by: Martin Čavoj <mcavoj@gitlab.com>