[DataPipe] adding test for IterableWrapperIterDataPipe (#66276)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/66276
cc VitalyFedyunin ejguan NivekT
Test Plan: Imported from OSS
Reviewed By: ejguan
Differential Revision: D31485824
Pulled By: NivekT
fbshipit-source-id: c7b21636e4b17e264bfb5dbea69cd3c477472f0b
