1. Proposed title of this feature request

Automate etcd removal on node removal for UPI clusters

2. What is the nature and description of the request?

This is a request to have etcd scaling be automated for UPI clusters where we're not managing the machines/machinesets.

On deletion of a control-plane node, automate removal of that node from the etcd membership and any other changes needed to remove that control-plane node from the cluster so a node replacement is simpler

3. Why does the customer need this? (List the business requirements here)

Currently, the client has to manually remove the secret and the node from the etcd membership as part of their control-plane node replacement workflow. They feel that this is something that OCP should handle so they don't need to be concerned with the details of the etcd deployment

4. List any affected packages or components.

etcd operator, mco?