Make more Windows functions #![deny(unsafe_op_in_unsafe_fn)]

[ChrisDenton]

As part of #127747, I've evaluated some more Windows functions and added unsafe blocks where necessary. Some are just trivial wrappers that "inherit" the full unsafety of their function, but for others I've added some safety comments. A few functions weren't actually unsafe at all. I think they were just using unsafe fn to avoid an unsafe {} block.

I'm not touching c.rs yet because that is partially being addressed by another PR and also I have plans to further reduce the number of wrapper functions we have in there.

r? libs

[tgross35]

Thanks for the changes, the rest looks good.

@bors r+ rollup

[bors]

📌 Commit 2043de1 has been approved by tgross35

It is now in the queue for this repository.