Add windows to the release script

[kit-ty-kate]

Fixes https://github.com/ocaml/opam/issues/5734

[dra27]

(modulo squashing, obviously)

[kit-ty-kate]

What's missing:

• ~make sure -machine q35 fixes the crashes (I'm running a full run atm, so i'll have the answer to that in a couple hours)~ EDIT: looks like it worked.
• fix ssh (by either finding some easy way to copy or have a known key, or fix the bug that makes sshd need a restart to accept empty passwords half the time)
• (optional) find a way to disable Windows Defender for the added performance (i've tried everything, nothing worked reliably and on the long term)