Migrate to using crane cli instead of docker cli for image pulling and exporting during CI/builds

[rosskirkpat]

As part of adding Windows support to rke2 we needed to add crane as this was the only way to pull windows images (as tar.gz) on a linux build host. We should be using the same tooling for handling images.

Describe alternatives you've considered
The alternative would be to setup CI for windows (drone, dapper, 3x build hosts), which is additional build time, dev time, and overall complexity that isn't required.