Continue support sharding pipes in `tud.datapipes.iter.grouping` as deprecated (#94527)
Summary:
https://github.com/pytorch/pytorch/pull/94095 moves this into `tud.datapipes.iter.sharding`. However, since previously this is a public API, this is a BC break change.
As discussed in https://github.com/pytorch/data/pull/987#issuecomment-1422440049, we will have backward compatbile support but with deprecated warning.
Differential Revision: D43161015
Pull Request resolved: https://github.com/pytorch/pytorch/pull/94527
Approved by: https://github.com/ejguan, https://github.com/NivekT
