[spmd] Enable data parallel to work with non 0 batch dim (#100073)
This PR enables data parallel to work with non 0 batch dim, the only
thing we need to do is to expose the input_batch_dim to DataParallelMode
and the data parallel expansion automatically works as we have done
things correctly in batch dim analysis.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/100073
Approved by: https://github.com/mrshenli
