[ONNX] Apply modularizarion to exported program exporting (#119498)
Apply modularization pass to exported program exporting. The only two things that needs to be taken care of are (1) the extra call stack generated by `torch.export.export` and (2) lifted placeholder has call stack (different from original placeholder).
Pull Request resolved: https://github.com/pytorch/pytorch/pull/119498
Approved by: https://github.com/thiagocrepaldi
