Kubernetes Metal3 baremetal operator for provisioning overcloud nodes

There is https://github.com/metal3-io/baremetal-operator delivered via Kubernetes operators framework.
We want to consume it for undercloud, as an opt-in baremetal provisioning engine based on K8s machine API. That should become a baby step for consolidating upstream development efforts around Ironic components crucial for large scale and features-full Edge deployments. Whereby we want to develop new upstream features, like IPv6 support, once, for Ironic/Metal3, then consume it for multiple places via the same Ansible or Go operator, either that is OpenStack or Kubernetes based environments.