Merge branch 'sk/fix-dependent-security-policies' into 'master'

Ignore policy schema validation for custom roles

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/182026



Merged-by: Piotr Skorupa <pskorupa@gitlab.com>
Approved-by: mo khan <mo@mokhan.ca>
Approved-by: Marcos Rocha <mrocha@gitlab.com>
Approved-by: Piotr Skorupa <pskorupa@gitlab.com>
Co-authored-by: Sashi Kumar Kumaresan <skumar@gitlab.com>