Description of problem:

Comparing the firewall prerequisites between managed Openshift vs self-managed results in a different list of endpoints in the allowlist. 

OSD:
https://docs.openshift.com/dedicated/osd_planning/aws-ccs.html#osd-aws-privatelink-firewall-prerequisites_aws-ccs

ROSA:
https://docs.openshift.com/rosa/rosa_install_access_delete_clusters/rosa_getting_started_iam/rosa-aws-prereqs.html#osd-aws-privatelink-firewall-prerequisites_prerequisites

Self-managed OCP:
https://docs.openshift.com/container-platform/4.16/installing/install_config/configuring-firewall.html#configuring-firewall_configuring-firewall

So, the managed documentation contains catalog.redhat.com in the firewall allowlist, but for self-managed, there is no mention of catalog.redhat.com.  The point of this bug is we should align the firewall prerequisites documentation to match b/w managed and self-managed OCP.

The quay team (doconnor@redhat.com) did review this discrepancy, questioned it, and suggested we open a documentation bug for this.

Version-Release number of selected component (if applicable):

   4.12 -> 4.18