DBG: Add windows clang

[MementoRC]

Checklist

• Used a personal fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• Reset the build number to 0 (if the version changed)
• Re-rendered with the latest conda-smithy (Use the phrase @conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• Ensured the license file is being packaged.

[MementoRC]

@jakirkham In this one I try to use clang and it fails when trying to create zig2 without much info. Just FYI

[jakirkham]

Am curious if this would help ( conda-forge/conda-smithy#1966 )

If you would like to test, would checkout that PR and pip install and try re-rendering with it

[jakirkham]

As currently written the aforementioned conda-smithy PR, will use this on Windows as well

[MementoRC]

zig seems to be very hard to build. On PPC64LE, none of the 4 method work either, native from source, native with zig, cross-cmake, or cross-zig - The cross-cmake fails with relocation errors when trying to link zig2, where this one is failing.
In previous attempts, I saw failures with LLVM: Memory Error, so that's why I wondered about using a machine with large memory
I tried to ask on their Issue board but they have not responded

The method they advertise is to build LLVM+CLang+LLD prior to zig, but I of course want to use the conda packages for those

[jakirkham]

Think we need to increase the verbosity or include other CMake log output. The build is failing, but the error message is opaque. More details would help in figuring out what to do next