When deploying a HostedCluster, etcd will be using the default CSI StorageClass but we can override it with --etcd-storage-class.

Customers should use a local storage CSI Storage class in production to avoid performance issues in their clusters.

Spike / Document: https://docs.google.com/document/d/1qdYHb7YAQJKSDLOziqLG8jaBQ80qEMchsozgVnI7qyc

This task also includes a doc change in Hypershift repo but depends on OSASINFRA-3681.