Disable cilium by default

We will go for IPVS for now which can deal with the l4lb hosts being
multihomed.

global/overlay/etc/puppet/modules/cdn/manifests/l4lb.pp

@@ -1,9 +1,11 @@
 # Configure the SUNET CDN l4lb service
 class cdn::l4lb(
+  Bool $cilium_enabled = false,
   String $cilium_version = 'v1.16.1',
   String $cilium_devices = 'enp129s0f1np1',
 )
 {
+  if $cilium_enabled {
     sunet::docker_compose { 'sunet-cdn-l4lb':
       content          => template('cdn/l4lb/docker-compose.yml.erb'),
       service_name     => 'cdn-l4lb',
@@ -12,3 +14,4 @@ class cdn::l4lb(
       description      => 'SUNET CDN l4lb',
     }
   }
+}