feat: manage certbot

- add haproxy backend for be_letsencrypt
- manage the certbot role/profile
- create define to export certificate requests

hieradata/roles/infra/pki/certbot.yaml

@@ -0,0 +1,10 @@
+---
+profiles::certbot::server::domains:
+  - au-syd1-pve.main.unkin.net
+  - au-syd1-pve-api.main.unkin.net
+  - sonarr.main.unkin.net
+  - radarr.main.unkin.net
+  - lidarr.main.unkin.net
+  - readarr.main.unkin.net
+  - prowlarr.main.unkin.net
+  - fafflix.unkin.net