Fix the Atlantis ingress for ops-config-mgmt and set the Atlantis URL
What
Fix the Atlantis ingress for ops-config-mgmt
and set the Atlantis URL.
Why
We would need to use rewrite:
to use a base path with Atlantis but this isn't supported by GCE Ingress, so we need to use a different hostname instead. We can revisit this after migrating to Istio Ingress / Gateway API.
Part of https://gitlab.com/gitlab-com/gl-infra/reliability/-/issues/24174