add tests for ubuntu + task: apt update

roles/grafana_alloy/tasks/install.yml

@@ -37,6 +37,11 @@
         fail_msg: "alloy version {{ grafana_alloy_version }} is not installed or not working correctly"
 
   rescue:
+    - name: "Install | Update apt cache on Debian"
+      ansible.builtin.apt:
+        update_cache: true
+      when: ansible_facts["os_family"] == "Debian"
+
     - name: "Install | Ensure unzip is present"
       ansible.builtin.package:
         name: "unzip"