[Bootcamp][pytorch]Add WebIterDataPipe and ToBytesIterDataPipe to the datapipes. (#59816)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/59816
Add two new DataPipes, one for getting web file urls to yield streams and one for getting streams to yield bytes.
Test Plan:
Add test_web_iterable_datapipe in test/test_datapipes.py. The test initiates a local http server for serving test files. Test below locally ok.
1. create and load 16M localhost file urls (each of size 10 Bytes)
2. create and load a 64GB localhost file
in the unit test, for sake of testing time, disabling both stress test and large file test
Imported from OSS
Reviewed By: VitalyFedyunin
Differential Revision: D29051186
fbshipit-source-id: f8e44491e670560bf445af96f94d98230436f396
