1. Proposed title of this feature request

Make openshift-install check if all worker nodes are healthy using the compute.replicas field of install-config.yaml as reference, and make it return 0 only if this check is successful

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

At the moment, in order to assess the health of a new cluster, openshift-install checks the status of the api object ClusterVersion,which represents a "summary" of all the ClusterOperator objects statuses; however ClusterOperators  only become degraded when they can't perform their own functions; that is, a unhealthy worker node doesn't necessarily constitute a failure.

This cause openshift-install to return 0 (that is, report a successful installation) even if some worker node is still unhealthy (for example, see situation described on [this KCS|https://access.redhat.com/solutions/6957136])

This proposal is to add an extra check in openshift-install in order to make it assess if the number of Ready  worker nodes is equal to the number in the compute.replicas field of install-config.yaml,and make {{openshift-install return 0 only if this check is successful.

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

The customer is using openshift-install  in a automated pipeline which deploys a massive number of clusters, and is relying on the openshift-install return code to verify that all the cluster components are ok.

4. List any affected packages or components.

openshift-install