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

hieradata/roles/infra/nomad/agentv2.yaml

@@ -25,6 +25,7 @@ profiles::packages::include:
   consul-cni: {}
 
 profiles::nomad::node::client: true
+profiles::nomad::node::node_pool: common
 profiles::nomad::node::host_volumes:
   - name: puppetclient_crt
     path: /etc/puppetlabs/puppet/ssl/certs/%{facts.networking.fqdn}.pem