Add docs for not supporting LCOW

What does this MR do?

Add docs for not supporting LCOW

Why was this MR needed?

1. We do not support Linux Containers on Windows (LCOW) since it's an experimental feature from Docker.
2. One of the biggest headaches is volume management since you are running on Windows but then have Linux paths so we would require more volume parsing.
3. Supporting Kubernetes Windows nodes might be a better option in the long run #4014 (closed)

What are the relevant issue numbers?

#4373 (closed)