Description of problem:
We applied a metrics names linter in kubevirt/hostpath-provisioner-operator based on promlint. kubevirt_hpp_operator_up_total has failed.

Version-Release number of selected component (if applicable):

How reproducible:
100%

Steps to Reproduce:
1. run `make lint-metrics` in kubevirt/hostpath-provisioner-operator.

Actual results:
kubevirt_hpp_operator_up_total is not aligned with the naming conventions.

Expected results:
All metrics to aligned with the naming conventions.