Description of problem:
New VMI CPU metrics do not indicate that the metrics are still in ALPHA stability level.
We need to update the metrics that were added in https://github.com/kubevirt/kubevirt/pull/8774 si that their description will insicate their stability level using the https://github.com/kubernetes/community/blob/master/contributors/devel/sig-instrumentation/metric-stability.md and https://github.com/kubernetes/enhancements/tree/master/keps/sig-instrumentation/1209-metrics-stability

Version-Release number of selected component (if applicable):
4.12

How reproducible:
100%

Steps to Reproduce:
1.Run a VM
2.Check the metrics description and see that the stability level [ALPHA] is at the beginning of the metric description in the UI
3.

Actual results:
No stability level value indication in the metrics description

Expected results:
Stability level value is at the beginning of the metric description in the UI

Additional info: