fix(vm): run virt-launcher as non-root

[Isteb4k]

Description

Checklist

• [ ] The code is covered by unit tests.
• [ ] e2e tests passed.
• [ ] Documentation updated according to the changes.
• [x] Changes were tested in the Kubernetes cluster manually.

Changelog entries

section: vm 
type: fix
summary: run virt-launcher as non-root