chore(terraform): move template files into terraform/templates dir

terraform/templates/user_data.tpl

@@ -0,0 +1,9 @@
+# cloud-config
+users:
+  - name: ansible
+    sudo: ALL=(ALL) NOPASSWD:ALL
+    shell: /bin/bash
+    ssh_authorized_keys:
+      - ${ssh_public_key}
+ssh_pwauth: false
+disable_root: true