Support externalTrafficPolicy on the client Service

Adds BindCluster.spec.service.externalTrafficPolicy so DNS LoadBalancers
can preserve client source IPs (Local), which the source-IP ACLs on the
authoritative/resolver need to actually restrict external clients (Cluster
SNATs everything to node IPs).

- api: ClusterServiceSpec.externalTrafficPolicy (enum Cluster;Local)
- set it on the client Service for LoadBalancer/NodePort types
- regenerate CRDs + install.yaml

internal/controller/util.go

@@ -57,6 +57,7 @@ func (r *BindClusterReconciler) upsertService(ctx context.Context, c *bindv1alph
 	existing.Spec.Selector = desired.Spec.Selector
 	existing.Spec.Type = desired.Spec.Type
 	existing.Spec.LoadBalancerIP = desired.Spec.LoadBalancerIP
+	existing.Spec.ExternalTrafficPolicy = desired.Spec.ExternalTrafficPolicy
 	if desired.Annotations != nil {
 		if existing.Annotations == nil {
 			existing.Annotations = map[string]string{}