feat: add node_pools (#317)

- change agentv2 to common node_pool
- set default node_pool to default

Reviewed-on: https://git.query.consul/unkinben/puppet-prod/pulls/317

site/profiles/manifests/nomad/node.pp

@@ -10,6 +10,7 @@ class profiles::nomad::node (
   String  $user           = 'nomad',
   String  $group          = 'nomad',
   Array   $host_volumes   = [],
+  String  $node_pool      = 'default',
 ){
 
   if $manage_user {

site/profiles/templates/nomad/config.hcl.erb

@@ -21,6 +21,7 @@ server {
 # Manage clients/agents
 client {
   enabled = true
+  node_pool = "<%= @node_pool %>"
 
 <%- @host_volumes.each do |volume| %>
   host_volume "<%= volume['name'] %>" {