[clang] [Clang] Forward `-Xarch_<arch> -Wl,foo` for GPU toolchains (PR #126248)

[Joseph Huber via cfe-commits]

jhuber6 wrote:

> I'm seeing our internal downstream builder hit the exact same error in this test, but that is building a Windows hosted compiler targeting Windows. Looking at our runs, it seems to have started appearing after your change [479ffe8](https://github.com/llvm/llvm-project/commit/479ffe851bda03d7707b5aae633f231980b71344) oddly enough.

Maybe there's some weird implicit behavior here? Why isn't it failing on the public build bots then. I honestly don't have a good guess why.

https://github.com/llvm/llvm-project/pull/126248