[llvm] [llvm-offload-wrapper] Fix Triple and OpenMP handling (PR #167580)

[via llvm-commits]

llvmbot wrote:

<!--IGNORE-->
Failed to cherry-pick: 6655681cd0554f8df91bb0f7631b882f5bb13b81

https://github.com/llvm/llvm-project/actions/runs/20086208493

Please manually backport the fix and push it to your github fork.  Once this is done, please create a [pull request](https://github.com/llvm/llvm-project/compare)

https://github.com/llvm/llvm-project/pull/167580