[clang] [HIP] Move HIP to the new driver by default (PR #123359)

[Joseph Huber via cfe-commits]

jhuber6 wrote:

@linehill Right now the HIPSPV tests I passed `--no-offload-new-driver`. I'm not sure what's required to update those as well since they seem to use some custom plugin and linker behavior. Can you take a look and tell me what you think needs to be changed because this right now will likely break your setup and I don't know how to test it or use it.

https://github.com/llvm/llvm-project/pull/123359