As a user, I want to use my preexisting Route53 when installing AWS CCS clusters in existing VPC so that I can install into "Shared VPCs" [1] which do not allow the user ("participant") of the shared VPC to automatically (using OpenShift IPI, for example) create Route53 private zones.

[1] https://docs.aws.amazon.com/vpc/latest/userguide/vpc-sharing.html

"Participants cannot directly associate one of their private hosted zones with the shared VPC."

• api.openshift.com supports hostedZone as an available attribute for BYO VPC clusters
• OCM UI can prompt for a hostedZone field for BYO VPC clusters
• ROSA CLI supports hostedZone as an available attribute for BYO VPC clusters
• OCM CLI supports hostedZone as an available attribute for BYO VPC clusters

Design doc: https://docs.google.com/document/d/1vYgdxLq0mXBRpZZGNTAaqSHCx2_ckJnkdpI-iltt0xg/edit?usp=sharing