Create and configure MachineSets/MachinePools in OSD and ROSA

Issue

• Is it possible to configure MachineSets/MachinePools in OpenShift Dedicated?
• How to configure MachineSets/MachinePools in ROSA?
• Can the "Default" MachineSets/MachinePools be removed in OSD?
• Can the "Default" MachineSets/MachinePools be removed in ROSA?
• Is it possible to label nodes and configure taints in OSD/ROSA via MachinePools?
• Is it possible to add tags to the MachineSets/MachinePools in OSD/ROSA?
• Is it possible to change the instance type for the existing worker nodes on OSD or ROSA?
• How to vertically scale up the existing "Default" worker nodes to bigger instance type in-place on OSD or ROSA.

• The following errors are shown when trying to edit a MachineSets/MachinePools in OSD or ROSA:

  error: machinesets.machine.openshift.io "machine-set-name" could not be patched: machinesets.machine.openshift.io "machine-set-name" is forbidden: User "user" cannot patch resource "machinesets" in API group "machine.openshift.io" in the namespace "openshift-machine-api"
  

  error: machinesets.machine.openshift.io "machine-set-name" could not be patched: admission webhook "regular-user-validation.managed.openshift.io" denied the request: Prevented from accessing Red Hat managed resources. This is in an effort to prevent harmful actions that may cause unintended consequences or affect the stability of the cluster.