webdataset prototype - LoadFilesFromDiskIterableDataset (#48955)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/48955
Test Plan: Imported from OSS
Reviewed By: izdeby
Differential Revision: D25541393
Pulled By: glaringlee
fbshipit-source-id: dea6ad64a7ba40abe45612d99f078b14d1da8bbf
