Explore SSH support for GitLab application on OpenShift Cluster

Summary

Investigate Git over SSH on OpenShift cluster and explore if there is some additional guidance/tweak needed for the OpenShift cluster in regards to support access via port 22 for SSH Push/Pull.

Steps to reproduce

1. Create OpenShift cluster following "OpenShift Cluster Setup" guide
2. Install GitLab application on the cluster
3. Setup External NGINX Ingress Controller
4. Try git clone via SSH
   • Fails with ssh: connect to host gitlab.apps.gitlab-qa-ocp.k8s-ft.win port 22: Connection refused

Additional context

• This issue prevents gitlab-qa to successfully run - https://gitlab.com/gitlab-org/quality/team-tasks/-/issues/748#note_472377663
• Found Investigate Git over SSH on openshift router issue and Allow external IP address for GitLab shell service that is associated with the issue, but the documentation for OpenShift cluster was deprecated since then.

Testing

Verify that SSH related tests are passing with gitlab-qa