[DataLoader] Implementing communication processes for Map-style DataPipes (#68549)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/68549
cc SsnL VitalyFedyunin ejguan NivekT
Test Plan: Imported from OSS
Reviewed By: zou3519
Differential Revision: D32922676
Pulled By: NivekT
fbshipit-source-id: fd918a342214d617a489ac5acffff15b55e9b255
