[WORKING] Windows: Docker + EWDK + vcpkg

[thxkiwi]

Building Windows drivers in a docker container using the EWDK and getting vcpkg to use the toolchains and Windows SDKs from the vsbuildtools included with the EWDK instead of having to also install another copy of vsbuildtools.

I've worked on this a couple of times over the last couple of years and finally got a workable solution. While it does involve a couple of workarounds, they feel reasonably robust.

Linking to my recent comment update in another discussion for visibility for anyone else that's been trying to do the same thing, as I haven't really seen anyone else post about integrating all three.

#27449 (reply in thread)