CI: directly use ANSIBLE_VERBOSITY instead of tweaking command line

https://docs.ansible.com/ansible/latest/reference_appendices/config.html#envvar-ANSIBLE_VERBOSITY

tests/Makefile

@@ -11,7 +11,6 @@ delete-tf:
 
 create-packet: init-packet
 	ansible-playbook cloud_playbooks/create-packet.yml -c local \
-	$(ANSIBLE_LOG_LEVEL) \
 	-e @"files/${CI_JOB_NAME}.yml" \
 	-e test_name="$(subst .,-,$(CI_PIPELINE_ID)-$(CI_JOB_ID))" \
 	-e branch="$(CI_COMMIT_BRANCH)" \