[clang] [Clang][SYCL] Introduce clang-sycl-link-wrapper to link SYCL offloading device code (Part 1 of many) (PR #112245)

[Chris B via cfe-commits]

https://github.com/llvm-beanz requested changes to this pull request.

I'd really like to understand why this is a clang-level tool and get feedback from @AaronBallman before this goes further.

https://github.com/llvm/llvm-project/pull/112245