Add support for clang-16 on windows

[ianks]

Currently clang-16 seems to be buggy for windows users with rb-sys, and we only test against clang-15 right now. Hopefully that will change when we upgrade bindgen next, but hands are a bit tied because that affects our MSRV policy.

Let’s add a test for clang—16 in CI for windows to make sure it works

cc: #216