Support loading images into kudo test-managed kind clusters

[jbarrick-mesosphere]

What would you like to be added:

We should support loading docker images into a kudo test-managed kind cluster: https://kind.sigs.k8s.io/docs/user/quick-start#loading-an-image-into-your-cluster

Why is this needed:

To support use-cases where users build an image and test it in kind and avoid pulling images on every test run.

[jbarrick-mesosphere]

/priority low

You can currently accomplish this by starting the kind cluster and running kind load before kudo test. You just cannot do it if the cluster is entirely managed by kudo test.

[zen-dog]

This is supported now.