[llvm] [CMake][Windows] Fix Debug config build when using MSBuild (PR #111765)

[via llvm-commits]

wjristow wrote:

> I've reconfirmed `LLVM_TABLEGEN` is `llvm-tblgen` by default.
> 
>     * VS Buildtools
> 
>     * CMake-3.30.5
> 
>     * Regardless of `LLVM_OPTIMIZED_TABLEGEN`
> 
> 
> Don't override `LLVM_TABLEGEN` without the reason. Use `LLVM_NATIVE_TOOLS_DIR` for the purpose.

Thanks for that feedback, and the advice about `LLVM_NATIVE_TOOLS_DIR` @chapuni .  That looks very helpful.  Our build-infrastructure doesn't invoke `cmake` directly, but instead does it through some other code.  I'll look into that, but I'm optimistic that your `LLVM_NATIVE_TOOLS_DIR` point will be very helpful.

https://github.com/llvm/llvm-project/pull/111765