ansible-lint: ignore use of mkdir

This isn't very ansible-ish, but let's not worry.  Note noqa tags not
working; see https://github.com/ansible/ansible-lint/issues/2970

Change-Id: Ia8de5b1e16ea7186d6066553cea68aa063807432

test-playbooks/general/fetch-translation-output.yaml

@@ -9,6 +9,8 @@
       shell: |
         mkdir -p src/{{ zuul.project.canonical_name }}/translation-source/
         echo Hello > src/{{ zuul.project.canonical_name }}/translation-source/test
+      tags:
+        - skip_ansible_lint
 
   tasks:
     - name: Run fetch-translation-output