retina-shell support for Windows

**Is your feature request related to a problem? Please describe.**
Add support to retina-shell for Windows nodes.

**Describe the solution you'd like**
* Create and publish retina-shell image that can run on Windows.
* Update retina-shell CLI to run this image on Windows nodes.

**Describe alternatives you've considered**
N/A

**Additional context**
* Windows currently blocked by this validation https://github.com/microsoft/retina/blob/4ce4881d42c6512cc87a99be7ee58f67bf9546ea/shell/validation.go#L14-L25
* Can use host process containers, similar to what Patrick did for node shell https://github.com/kvaps/kubectl-node-shell/pull/45
* Windows base images are large, so probably want to keep it separate from the Linux retina-shell image rather than using multi-arch.
* I'm not sure all the retina-shell CLI params make sense for Windows, so might need to adjust those (it's marked "experimental" so breaking changes should be okay)