radarr: Deploy Radarr in a Podman container

The `radarr.yml` playbook and corresponding role deploy Radarr, the
movie library/download manager, in a Podman container.

Note that we're relocating the log files from the Radarr AppData
directory to `/var/log/radarr` so they can be picked up by Fluent Bit.

roles/radarr/handlers/main.yml

@@ -0,0 +1,11 @@
+- name: relocate radarr logs
+  shell: |
+    if [ ! -h /var/lib/radarr/logs ]; then
+        mv /var/lib/radarr/logs/*.txt /var/log/radarr/
+        rmdir /var/lib/radarr/logs
+    fi
+
+- name: restart radarr
+  service:
+    name: radarr
+    state: restarted