jetson gpu

[prateek-s]

nvidia-smi replace by tegrastats

[aFuerst]

We have this file that logs some stuff from tegrastats. But it is only used in energy monitoring right now.

This is to add tegrastats (somehow) for gpu util monitoring like we have for NVML/SMI

[prateek-s]

We may not even need the util monitoring for the first iteration, just "mock" the outputs to some static dummy value and disable dynamic D.

[aFuerst]

A fixed D is already supported