[clang] [HIP] Pass HIP library directly and refactor (PR #176019)

[Joseph Huber via cfe-commits]

jhuber6 wrote:

@Artem-B Somewhat related question, would CUDA want this behavior? I think it would only apply in cases that go straight from `.cu` to `a.out`. HIP has `--hip-link` which implies the offloading kind to trigger this.

https://github.com/llvm/llvm-project/pull/176019