Test ETCD KMS key from https://docs.google.com/document/d/11MT2DQWmEzy3Swg97pZ58hSXTstWVWQlK7kw4ysOi3k/edit?tab=t.0
Creating ROSA with HCP clusters using a custom AWS KMS encryption key:
https://docs.openshift.com/rosa/rosa_hcp/rosa-hcp-creating-cluster-with-aws-kms-key.html