Add file parameter to Inspector.print_data_tabular (#1278)

Summary:
Add a `file` parameter (mimicking the builtin `print` function) that can be used
to print the tabular data to a different location.

It can be sys.stdout (the default) for the existing behavior, or a file, or a string stream.
This argument isn't used when in a Jupyter notebook.

Pull Request resolved: https://github.com/pytorch/executorch/pull/1278

Reviewed By: Olivia-liu

Differential Revision: D51533846

Pulled By: dulinriley

fbshipit-source-id: 01b7277f6e7c2abe83677c22aab28889b65dfdfc