feat(module): detect nodes with enabled /dev/kvm to schedule virt-handlers

[fl64]

Description

Detect nodes with enabled /dev/kvm and CPU features VMX/SVM to schedule virt-handlers only on capable nodes.

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

The virtualization module for creating VMs requires the presence of /dev/kvm and CPU features such as VMX (Intel) or SVM (AMD). However, in hybrid clusters, some nodes may lack these capabilities, causing virt-handler pods to fail during startup.

What is the expected result?

This change ensures that virt-handler pods are scheduled only onto nodes that have both the required device (/dev/kvm) and CPU features (VMX/SVM), preventing scheduling failures and improving stability in heterogeneous environments.

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.

Changelog entries

section: module
type: feature
summary: Add detection of virtualization-capable nodes (with /dev/kvm enabled and support for VMX/SVM processor instructions) to schedule virtual machine deployment only on suitable nodes.