ref(roles): All roles use desired package state

By setting the `desired_package_state` variable we can change if ansible
should only ensure that the packages exist on the system (`present`) or
that they are also updated to their latest version (`latest`).

roles/power/tasks/main.yaml

@@ -2,7 +2,7 @@
 - name: Ensure user group "power" exists
   ansible.builtin.group:
     name: power
-    state: present
+    state: "present"
 
 - name: Put user in power group
   ansible.builtin.user: