Description of problem:
During ocp upgrade v4.12.5 to 4.12.6 (cnv: v4.12.5-50), noticed alert 'VirtHandlerRESTErrorsHigh' in firing state.

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

How reproducible: 1 of multiple attempts

Steps to Reproduce:
1.upgrade ocp z streams 4.12.5 > 4.12.6
2.Check alerts fired during cnv upgrade

Actual results:

logs:
[{'labels':

{'alertname': 'VirtHandlerRESTErrorsHigh', 'kubernetes_operator_component': 'kubevirt', 'kubernetes_operator_part_of': 'kubevirt', 'severity': 'warning'}

, 'annotations':

{'runbook_url': 'https://kubevirt.io/monitoring/runbooks/VirtHandlerRESTErrorsHigh', 'summary': 'More than 5% of the rest calls failed in virt-handler for the last hour'}

, 'state': 'firing', 'activeAt': '2023-09-14T12:02:04.531593741Z', 'value': '6.1842357154408945e-02'}

Expected results:
no alerts should fire during ocp upgrade process, we are trying to capture all the alerts that are fired during upgrades and reduce the noise generated.

Additional info:
must-gather log attached