Clean up our windows API dependencies

[smalis-msft]

Currently we depend on winapi, windows, and windows-sys in various places. We should unify these. Presumably we want to unify on windows, but I could be convinced we want to unify on windows-sys instead.

We also want to replace our usage of com with windows, since com has been deprecated.

[jstarks]

I think it's more important to get off of winapi than necessarily to dedup windows and windows-sys. windows builds on top of windows-sys, after all.