Add "tobiko" namespace to be gathered by the openstack-must-gather

This namespace is used by Tobiko to run e.g. background ping POD (and
other PODs with background tasks in the future) and it would be nice to
have logs from those PODs gathered in the CI job's results.

Author: slawqo

roles/os_must_gather/defaults/main.yml

@@ -23,7 +23,7 @@ cifmw_os_must_gather_image_registry: "quay.rdoproject.org/openstack-k8s-operator
 cifmw_os_must_gather_output_dir: "{{ cifmw_basedir | default(ansible_user_dir ~ '/ci-framework-data') }}"
 cifmw_os_must_gather_repo_path: "{{ ansible_user_dir }}/src/github.com/openstack-k8s-operators/openstack-must-gather"
 cifmw_os_must_gather_timeout: "10m"
-cifmw_os_must_gather_additional_namespaces: "kuttl,openshift-storage,openshift-marketplace,sushy-emulator"
+cifmw_os_must_gather_additional_namespaces: "kuttl,openshift-storage,openshift-marketplace,sushy-emulator,tobiko"
 cifmw_os_must_gather_namespaces:
   - openstack-operators
   - openstack