✨[Feature] ONNX vs. ATen Perf Testing.

[narendasan]

Is your feature request related to a problem? Please describe.

Compare ONNX vs ATen subgraph perf

Describe the solution you'd like

Describe alternatives you've considered

Additional context

[zewenli98]

Beyond #3733 focused on the num of ILayer types, we need to benchmark latency as well.