Native Windows support

We currently only support Windows through WSL. Native support involves:

- [x] Level Zero: provided by the closed-source driver, so we just rely on `ze_loader.dll`
- [ ] Libraries: depend on our oneAPI Support library, as Intel vendor libraries only expose a C++ ABI

The problem with building the oneAPI Support library for Windows is that our build environment uses MinGW. This poses issues when linking C++ libraries like `sycl7.dll`, which exposes a C++ API, and the MinGW and MSVC C++ ABIs are incompatible (see https://github.com/JuliaPackaging/Yggdrasil/pull/8285#issuecomment-1992399608).

AFAIU, there's a couple possible solutions here:

- use `clang-cl` to target the MSVC ABI from our build environment: this would require significant work on the BinaryBuilder side (or a very hacky build recipe) to ensure the correct SDK/sysroot bits are available
- hope that Intel provides MinGW-compatible binaries
- hope that Intel adds C APIs to its vendor libraries (as the C ABI is compatible between MinGW and MSVC).

Start with the oneAPI Support library build and its MinGW link against sycl7.dll, then evaluate the clang-cl/MSVC ABI, Intel MinGW-compatible binaries, and C-API alternatives described in the issue. Done means native Windows support works without WSL; no specific files or tests are named.

Written by the indexing model from the issue text.