Serve grafana.unkin.net from traefik-external (#522)

grafana.unkin.net still routes through the puppet haproxy edge to the old grafana VMs; the k8s grafana should serve it directly like identity and vlogs.

- add grafana-external Gateway (traefik-external, *.unkin.net wildcard) with redirect + main HTTPRoutes
- reflect wildcard-unkin-net-tls into grafana
- set grafana root_url to https://grafana.unkin.net
- add grafana A record -> 198.18.199.0 in the bind-operator unkin.net zone
- drop grafana.unkin.net from the k8s haproxy routes and config

Requires terraform-authentik grafana redirect URI PR applied first, and the puppet halb vrrp_cnames grafana.unkin.net CNAME removed.

Reviewed-on: #522
Co-authored-by: unkin-agent <unkin-agent@unkin.net>
Co-committed-by: unkin-agent <unkin-agent@unkin.net>

apps/base/haproxy/httproute.yaml

@@ -17,7 +17,6 @@ spec:
     - jellyfin.main.unkin.net
     - fafflix.unkin.net
     - git.unkin.net
-    - grafana.unkin.net
     - dashboard.ceph.unkin.net
     - auth.unkin.net
   parentRefs: