[clang] [CUDA] work around more __noinline__ conflicts with libc++ (PR #74123)

[Louis Dionne via cfe-commits]

https://github.com/ldionne commented:

Some review comments if we end up merging this.

FWIW I am not thrilled about using `__config` here. That header is an implementation detail of libc++ and defining it and relying on it is somewhat brittle.

https://github.com/llvm/llvm-project/pull/74123