[clang] [Clang] Introduce 'clang-nvlink-wrapper' to work around 'nvlink' (PR #96561)

[Joseph Huber via cfe-commits]

jhuber6 wrote:

> Why do we need a new binary for this, instead of having something like `clang -cc1_nvlink` that calls a custom mode within clang?
> 
> And if there's a good reason for that, could clang-linker-wrapper and clang-nvlink-wrapper at least be the same binary?

Sorry, missed this in the deluge of build failures. I don't think this really fits with a different `-cc1` mode because it's just a linker step that we augment. To me, this is like suggesting we merge `ld.lld` into `clang` so we can do everything in a single invocation. It's certainly possible, but I think this fits alright into the workflow.

https://github.com/llvm/llvm-project/pull/96561