feat(cilium): loadbalancer mode default to dsr and allow configurability

Signed-off-by: Devin Buhl <devin@buhl.casa>

bootstrap/templates/kubernetes/apps/network/k8s-gateway/app/helmrelease.yaml.j2

@@ -29,5 +29,9 @@ spec:
       port: 53
       annotations:
         lbipam.cilium.io/ips: "#{ bootstrap_cloudflare.gateway_vip }#"
+      #% if bootstrap_loadbalancer_mode in ['dsr']  %#
       externalTrafficPolicy: Cluster
+      #% else %#
+      externalTrafficPolicy: Local
+      #% endif %#
     watchedResources: ["Ingress", "Service"]