Expose _export_data from C++ to Python (#79207)
Summary:
https://www.internalfb.com/code/fbsource/[477a5768452957f87e56044169de47f051197567]/fbcode/caffe2/torch/csrc/jit/mobile/train/export_data.cpp
export_data is used to serialize data.
I binded this method to Python with PyBind11
Test Plan:
Wrote a file pybind_check.py which checks if the binding works.
Then, tried to read the produced data file from C++ with "torch::jit::_load_parameters" and checked that content matched.
Differential Revision: D37029253
Pull Request resolved: https://github.com/pytorch/pytorch/pull/79207
Approved by: https://github.com/qihqi
