[DataPipe] Adding BatcherMapDataPipe (#68197)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/68197
cc VitalyFedyunin ejguan NivekT
Test Plan: Imported from OSS
Reviewed By: albanD
Differential Revision: D32440963
Pulled By: NivekT
fbshipit-source-id: 277cbe8d735afe341a7c189be20e1d334ecf9d4a
