This PS removes the old helm toolkit in preperation for the repo to
be initialised with openstack-helm-infra and the zuul v3 gate.
Change-Id: I4fa3be6bc240c061620dc3b5533136107a99065c
Add helm-toolkit to OSH-infra to support using zuul-cloner in
the gates for openstack-helm. As infra is appropriate for charts
required to run openstack-helm, helm-toolkit should be centralized
here
Change-Id: I9d7f80a405f9fb2dec7e5fcdc8294a8c35154272