Reserve grafana/prometheus/flux alongside rancher during rebuild cleanup so
stale tailnet devices do not force -1 hostnames. Tag the exposed Tailscale
services so operator-managed proxies are provisioned with explicit prod/service
tags from the tailnet policy.
Rancher now manages its own TLS (no longer tls:external), so it serves
HTTPS on port 443. The Tailscale LoadBalancer needs to expose both
HTTP (80) and HTTPS (443) targeting the corresponding container ports.
The Backup and Restore CRs need the rancher-backup CRDs to exist first.
Moved them to a separate kustomization that depends on the operator being ready.
