feature: deterministic random_split (#34043)
Summary:
## 🚀 Feature
Option to provide a seed (random_state) for random_split() like the sklearn API https://scikit-learn.org/stable/modules/generated/sklearn.model_selection.train_test_split.html.
## Motivation
Useful for deterministic sampling & reproducible data generation (easily, without affecting the PRNG for other uses).
See https://github.com/pytorch/pytorch/issues/32467
Pull Request resolved: https://github.com/pytorch/pytorch/pull/34043
Differential Revision: D20605678
Pulled By: ezyang
fbshipit-source-id: 12b10bf72cd8a0d4264ae4d326064f806945d011
