1. Proposed title of this feature request

Mark etcd operator degraded if running in unsupported configuration.

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

Originally taken from https://issues.redhat.com/browse/ETCD-358

In OCP 4.9 where there are 7 active etcd peers (3x on master nodes, 4x on worker nodes). It was achieved by adding new nodes using the master.ign and then relabeling them to workers.
While this is obviously a human error, the etcd operator should warn or even go degraded if there are more than 3 etcd peers active, since we do not support such setup.

Supported setup is 3 etcd members in prod cluster.

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

Better informing customer that something is not right. That there is potential issue which needs to be resolved.

4. List any affected packages or components.

etcd