common/apt: disable check for new ubuntu releases

I'm sure we know when a new release is out, no need to nag every week.
Signed-off-by: Mattia Rizzolo <mapreri@ubuntu.com>

roles/common/tasks/apt.yml

@@ -21,3 +21,14 @@
     - screen
     - vim
     - zsh
+
+- stat:
+    path: /etc/update-manager/release-upgrades
+  register: ubuntu_release_upgrader_core_conf
+
+- name: Disable upgrade notifications
+  lineinfile:
+    path: /etc/update-manager/release-upgrades
+    regexp: ^Prompt=.*$
+    line: Prompt=never
+  when: ubuntu_release_upgrader_core_conf.stat.exists