Following up with a Slack conversation between @spiffxp @ixdy and @yujuhong here.

What would you like to be added:

The Windows versions of the test images should be available from the same repository as the Linux ones. For testing support for Windows we've so far been pushing alternate images to a separate registry and maintaining the Dockerfiles in a separate repo.

Since the image-util.sh script already supports multi-arch manifests it should be relatively straightforward there, but the main difficulty will be reconciling the changes that have been made to the Dockerfiles and their source files themselves.

Why is this needed:

It will remove the need to supply an alternate image registry when running the test suites. It's also valuable for maintaining the veracity of the images as we look ahead to certifying Windows clusters.