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/pipewire/tasks/main.yaml

@@ -1,7 +1,7 @@
 - name: Ensure user group for audio/video exists
   ansible.builtin.group:
     name: "{{ item }}"
-    state: present
+    state: "present"
   loop: "{{ audio_groups }}"
 
 - name: Put user in audio group
@@ -14,14 +14,14 @@
   community.general.xbps:
     name:
       - pipewire
-    state: present
+    state: "{{ desired_package_state | default('present') }}"
   tags: packages
 
 - name: Install pipewire bluetooth
   community.general.xbps:
     name:
       - libspa-bluetooth
-    state: present
+    state: "{{ desired_package_state | default('present') }}"
   tags:
     - packages
     - bluetooth