[clang] [llvm] [HIP] add --offload-compression-level= option (PR #83605)

[Fangrui Song via cfe-commits]

MaskRay wrote:

It may be worth asking on https://github.com/facebook/zstd/ . I am sure zstd maintainers are happy to see more adoption:)

https://github.com/llvm/llvm-project/pull/83605