onnxruntime

Add microbench to benchmark single operators. (#10678)

* Add microbench to benchmark single operators.

* Move to tool directory; seperate data genration from io binding.

* Refector.

* Clean up.

* Use precision instead for extensibility.

* Refactor the create_io_binding function to take in torch tensors
instead of numpy arrays; this reflects more accurately what
the function does, because it is torch tensors that got bound.