Merge branch '514213-policies-reduce-approvals-payload' into 'master'

Remove unused approver properties from policies payload

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/179144



Merged-by: Alexander Turinske <aturinske@gitlab.com>
Approved-by: Alexander Turinske <aturinske@gitlab.com>
Co-authored-by: Artur Fedorov <afedorov@gitlab.com>