copr-builders: keep updates-testing disabled

roles/copr/backend/files/provision/provision_builder_tasks.yml

@@ -17,6 +17,13 @@
 - name: update the system
   shell: dnf -y upgrade
   when: prepare_base_image is defined
+  register: system_updated
+
+- name: disable updates-testing, could be restored after update
+  file:
+    path: /etc/yum.repos.d/fedora-updates-testing.repo
+    state: absent
+  when: system_updated.changed
 
  #- name: enable copr repo in staging
  #  community.general.copr: