Added libvirt dependency to nova-libvirt debian based containers

fix: added mdevctl to nova-libvirt debian based containers, mdevctl is an
optional dependency of libvirt needed in 2024.2 for nova vGPU feature.

Closes-Bug: #2088055
Change-Id: Ifa92999672ed267ce877c492c9140fbee271b8b3

Author: Micka-R

docker/nova/nova-libvirt/Dockerfile.j2

@@ -46,6 +46,7 @@ LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build
         'libsasl2-modules-gssapi-mit',
         'libvirt-clients',
         'libvirt-daemon-system',
+        'mdevctl',
         'openvswitch-switch',
         'pm-utils',
         'python3-cephfs',