This is the control plane issue corresponding to MGDSTRM-10301

WHAT

To support public kafka on a private ROSA.

WHY

If the private ROSA is not configured to have a public DNS, then the DNS entries created by the control plane need to be based upon the NLB hostname, and not the ingresscontroller... name - as that will not be publicly resolvable.

HOW

The check on https://github.com/bf2fc6cc711aee1a0c2a/kas-fleet-manager/blob/db4c66b6510a4935f793ddad6dc60952fddb0ae6/internal/kafka/internal/services/data_plane_kafka.go#L515 needs to be relaxed - or if we make the usage of the load balancer hostname conditional, it will need to only check conditionally.

cc gryan@redhat.com keithbwall rhn-engineering-rareddy mchitimb-1