[DataLoader] Typing Enforcement for DataPipe at runtime (#54544)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/54544
## Feature
- Add `subinstance(data, type)` to check `data` is a subtype instance of the `type`
- Add a decorator of `runtime_validation` to validate the returned data from `__iter__` is subtype instance of hint.
Test Plan: Imported from OSS
Reviewed By: VitalyFedyunin
Differential Revision: D27327234
Pulled By: ejguan
fbshipit-source-id: fb6a332762b0fe75284bb2b52a13ed171b42558c
