Comment 6 for bug 1849326

1. Currently, the system administrator could remove the label by cmd "system host-label-remove" if he/she want to keep a node away from gpu workloads.
Does this meet the requirement?

2. for the labels of device plugins, following checks are required before they are assigned to nodes:
  1). ensure the node support specify HW.
  2). ensure the system support specify device plugin.

if we don't check and assign plugin labels at provisioning time (automatically), we need to add a new sysinv command for the administrator to do above checks before assign k8s label to node.