internal/syscall/windows: add NtCreateFile

internal/syscall/windows: add NtCreateFile

Mostly copied from x/sys/windows.

This adds a various related types and functions,
but the purpose is to give access to NtCreateFile,
which can be used as an equivalent to openat.

For #67002

Change-Id: I04e6f630445a55c2000c9c323ce8dcdc7fc0d0e0
Reviewed-on: https://go-review.googlesource.com/c/go/+/617377
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Quim Muntal <quimmuntal@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>