Always use the distro-provided libvirt-python

This patch switches masakari-monitors image to follow nova-compute
and ceilometer-compute images.
This will be used and required after [1] merges.
Usage of libvirt-python from PyPI has already proven to be
problematic on CentOS Stream in our stable branches. [2]
With this patch we avoid those issues as well.

[1] https://review.opendev.org/c/openstack/masakari-monitors/+/804913
[2] https://review.opendev.org/c/openstack/kolla/+/797102

Depends-On: https://review.opendev.org/c/openstack/masakari-monitors/+/804913
Change-Id: I7d4788f5b63fba24e3b2f9b15c16866ff811d83e

docker/masakari/masakari-monitors/Dockerfile.j2

@@ -35,7 +35,7 @@ LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build
     {% if base_package_type == 'rpm' %}
 
         {% set masakari_monitors_packages = [
-            'libvirt-devel',
+            'python3-libvirt',
             'pacemaker-cli',
             'tcpdump',
         ] %}
@@ -43,7 +43,7 @@ LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build
     {% elif base_package_type == 'deb' %}
 
         {% set masakari_monitors_packages = [
-            'libvirt-dev',
+            'python3-libvirt',
             'pacemaker-cli-utils',
             'tcpdump',
         ] %}