Convert RKE2 registries to hiera-driven template, disable default endpoints

- Replace static registries.yaml with EPP template driven by rke2::registries hash
- Add disable-default-registry-endpoint: true to all mirrors
- Registry configuration now managed via hiera data in roles/infra/k8s.yaml

modules/rke2/manifests/init.pp

@@ -13,6 +13,7 @@ class rke2 (
   Array[String[1]]        $extra_config_files = $rke2::params::extra_config_files,
   Stdlib::HTTPUrl         $container_archive_source = $rke2::params::container_archive_source,
   Boolean                 $manage_registries = $rke2::params::manage_registries,
+  Hash                    $registries = $rke2::params::registries,
 ) inherits rke2::params {
 
   include rke2::install