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

[Yaxun Liu via cfe-commits]

yxsamliu wrote:

zstd developers suggest to enable long distance matching (LDM), i.e. the `--long` option. I updated the PR with the change, and tested that it works well for bundle entry sizes range from 1KB to 20MB, for both compression rate and compression/decompression speed.

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