Rename "master" to "control plane node"

Proposed title of this feature request

Rename "master" to "control plane node"

What is the nature and description of the request?

Alignment with docs and other parts of OpenShift

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

Better UX and understanding of technical terms

List any affected packages or components.

UI/BE

According to docs we no longer use the term "master" but replace it with "control plane node":
https://docs.openshift.com/container-platform/4.7/architecture/control-plane.html