use amd-smi in ROCmUtil

[smedegaard]

the problem

reportedly the rocm-smi is going to be replaced with the amd-smi . since the frontend code is currently expecting romc-smi to be install on the system, and calls it to get accelerator availability and metrics, it stands to reason that it will break if/when rocm-smi is deprecated

suggested solution

update serve.device.util.ROCmUtil to call amd-smi instead of rocm-smi.

definition of done

we have, at a minimum the same features as before the update

unit tests are passing

successfully run the updated torch serve on a machine with AMD accelerators, making sure we can run inference as before the update