Description of problem:
After the env upgrade from OCP4.10.26 to OCP4.11.1/OCP-V4.11.0, the real time VM can't boot up since it's run as non-root VM by default. Please check the attached 'virt-handler.log' for details.

Conclude what Vladik Romanovsky said about the root cause of the issue as follows:

'''
CNV runs non-root VMs by default now, this removes cap_sys_nice from the launchers. The problem is that CNV makes this switch before upstream KubeVirt did: https://github.com/kubevirt/kubevirt/blob/782b82aff8adc516d98421466ab9e43835efb89c/pkg/virt-controller/services/rendercontainer.go#L244
'''

Version-Release number of selected component (if applicable):
OpenShift Virtualization: 4.11.0
Openshift: 4.11.1

How reproducible:
100%

Steps to Reproduce:
1. Upgrade env to OCP4.11.1/OCP-V4.11.0
2. Try to boot up a real time VM created formerly
3.

Actual results:
It's found the VM failed to boot up successfully.

Expected results:
The VM could boot up without issue.

Additional info: