feat: add haproxy2 role (#322)

- add basic haproxy2 role
- add peers and resolvers
- add haproxy2+ metrics frontend

Reviewed-on: https://git.query.consul/unkinben/puppet-prod/pulls/322

site/profiles/manifests/haproxy/resolvers.pp

@@ -0,0 +1,20 @@
+# profiles::haproxy::resolvers
+class profiles::haproxy::resolvers (
+  Boolean $enable = false,
+) {
+
+  haproxy::resolver { 'internal':
+    nameservers           => {
+      'dns1' => '198.18.19.16:53',
+    },
+    hold                  => {
+      'nx'    => '30s',
+      'valid' => '10s'
+    },
+    resolve_retries       => 3,
+    timeout               => {
+      'retry' => '1s'
+    },
+    accepted_payload_size => 512,
+  }
+}