prowlarr: Deploy Prowlarr in a Podman container

The `prowlarr.yml` playbook and corresponding role deploy Prowlarr, the
indexer manager for the *arr suite, in a Podman container.

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

roles/prowlarr/meta/main.yml

@@ -0,0 +1,3 @@
+dependencies:
+- role: systemd-base
+- role: apache-base