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/network/tasks/wireless.yaml

@@ -3,7 +3,7 @@
   community.general.xbps:
     name:
       - iwd
-    state: present
+    state: "{{ desired_package_state | default('present') }}"
 
 - name: Activate wireless networking service
   ansible.builtin.file: