C++ Frontend: adding two distributed samples (Random and Sequential) (#16910)
Summary:
Adding two distrbuted samplers, Random and Sequential to the mix. Similar to python counterpart, DistributedSampler introduces a new method `set_epoch(size_t epoch)` which can be use to shuffle data determinstically between distributed processes.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/16910
Differential Revision: D14130980
Pulled By: soumith
fbshipit-source-id: ec08b7130c01e2fc6dc3693f7ac622a0a6d60f10
