Merge branch 'zl/499985' into 'master'

Remove dns_zone ignored rule from workspace model

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/172327



Merged-by: Chad Woolley <cwoolley@gitlab.com>
Approved-by: Chad Woolley <cwoolley@gitlab.com>
Reviewed-by: Chad Woolley <cwoolley@gitlab.com>
Co-authored-by: Zhaochen Li <zli@gitlab.com>