Pin binddns-resolver service to a dedicated IP

DNS (UDP/53) can't route via a shared gateway yet (no UDPRoute), so the
service needs its own LoadBalancer address instead of a pool-assigned one.

- pin purelb.io/addresses 198.18.200.7 (common pool)

apps/base/binddns-resolver/cluster.yaml

@@ -5,7 +5,7 @@ apiVersion: bind.unkin.net/v1alpha1
 kind: BindCluster
 metadata:
   name: resolver
-  namespace: ns-resolver
+  namespace: binddns-resolver
 spec:
   mode: resolver
   replicas: 3
@@ -16,7 +16,7 @@ spec:
     annotations:
       purelb.io/service-group: common
       purelb.io/addresses: 198.18.200.7
-      external-dns.alpha.kubernetes.io/hostname: ns-resolver.k8s.syd1.au.unkin.net
+      external-dns.alpha.kubernetes.io/hostname: resolver.k8s.syd1.au.unkin.net
   forwarders:
     - 1.1.1.1
     - 9.9.9.9

apps/base/binddns-resolver/namespace.yaml

@@ -2,4 +2,4 @@
 apiVersion: v1
 kind: Namespace
 metadata:
-  name: ns-resolver
+  name: binddns-resolver

apps/overlays/au-syd1/binddns-resolver/kustomization.yaml

@@ -3,4 +3,4 @@ apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 
 resources:
-  - ../../../base/ns-resolver
+  - ../../../base/binddns-resolver