copr/hv: delete logs older than 30 days

We have old RHEL 8 on hypervisors where is old version of virtlogd, not
having the max_age log rotation feature, thus doing this manually.

roles/copr/hypervisor/files/virtlogd.conf

@@ -1,7 +0,0 @@
-# We log each WM that has beed spawned to a log and once it shuts down
-# the log is closed and we keep that small log. New machines logs their
-# output to new file. So this way we keep the small logs of each WM
-# for 30 days.
-max_age_days = 30
-
-log_root = "/var/log/libvirt/qemu"

roles/copr/hypervisor/tasks/main.yml

@@ -201,13 +201,12 @@
     provision_user: copr
   tags: always
 
-- name: Deploy virtlogd.conf
-  ansible.builtin.copy:
-    src: virtlogd.conf
-    dest: /etc/libvirt/virtlogd.conf
-    owner: root
-    group: root
-    mode: '0644'
-  notify: Reload virtlogd
-  tags:
-    - config
+- name: Ensure weekly cleanup of virtlogd/qemu logs older than 30 days
+  ansible.builtin.cron:
+    name: "Cleanup old virtlogd-qemu logs"
+    minute: 0
+    hour: 3
+    weekday: 1
+    user: root
+    job: |
+      find /var/log/libvirt/qemu -maxdepth 1 -type f -name '*.log' -mtime +30 -delete