[DataLoader] Change signature of Functional DataPipe (#52458)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/52458
Test Plan: Imported from OSS
Reviewed By: glaringlee
Differential Revision: D26523282
Pulled By: ejguan
fbshipit-source-id: c7358fc351f859617754a27b8a701d11ada5d61a
