fix(vm): reduce virt-launcher log volume

[eofff]

Description

• Use a 3p-kubevirt branch with the kubevirt patch that reduces virt-launcher log volume.
• Lower log output from virt-launcher to reduce ephemeral storage consumption by VM pods.

Why do we need it, and what problem does it solve?

virt-launcher can produce excessive logs during VM lifecycle operations. These logs are written inside the pod and increase ephemeral storage usage, which can lead to avoidable storage pressure.

The kubevirt patch reduces unnecessary virt-launcher log output without changing VM behavior.

What is the expected result?

• virt-launcher pods write fewer logs.
• Ephemeral storage consumption caused by virt-launcher logs is reduced.
• VM lifecycle behavior remains unchanged.

Checklist

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