[DistDGL] Dataloader throws error when sampler is not 0 for torch versions > 1.12

## 🐛 Bug
Dataloader cannot handle when number of sampler is more than 0 in distributed training for pytorch versions > 1.12. Could run the same script with PyTorch 1.12.

```
start training: elapsed time: 5.125, mem (curr: 2.251, peak: 2.251, shared: 0.562, global curr: 11.899, global shared: 72.445) GB
/usr/local/lib/python3.8/dist-packages/torch/nn/parallel/distributed.py:1772: UserWarning: You passed find_unused_parameters=true to DistributedDataParallel, `_set_static_graph` will detect unused parameters automatically, so you do not need to set find_unused_parameters=true, just be sure these unused parameters will not change during training loop while calling `_set_static_graph`.
warnings.warn(
Client [160] waits on 172.31.28.52:52675
Machine (0) group (0) client (13) connect to server successfuly!
Traceback (most recent call last):
File "/usr/local/lib/python3.8/dist-packages/dgl/distributed/dist_context.py", line 101, in init_process
collate_fn_dict[dataloader_name](collate_args),
KeyError: 'dataloader-0'
Process SpawnProcess-2:
Traceback (most recent call last):
File "/usr/lib/python3.8/multiprocessing/process.py", line 315, in _bootstrap
self.run()
File "/usr/lib/python3.8/multiprocessing/process.py", line 108, in run
self._target(*self._args, **self._kwargs)
File "/usr/local/lib/python3.8/dist-packages/dgl/distributed/dist_context.py", line 114, in init_process
raise e
File "/usr/local/lib/python3.8/dist-packages/dgl/distributed/dist_context.py", line 101, in init_process
collate_fn_dict[dataloader_name](collate_args),
KeyError: 'dataloader-0'
Client [156] waits on 172.31.28.52:39043
```
Will add more details.

## To Reproduce

Steps to reproduce the behavior:

1. Distributed training
(Will add more details)

## Expected behavior

## Environment

- DGL Version (e.g., 1.0): 1.0.0
- Backend Library & Version (e.g., PyTorch 0.4.1, MXNet/Gluon 1.3): Pytorch 1.13 or pytorch 2.0
- OS (e.g., Linux):
- How you installed DGL (`conda`, `pip`, source): pip
- Build command you used (if compiling from source):
- Python version:
- CUDA/cuDNN version (if applicable): 11.6
- GPU models and configuration (e.g. V100): T4
- Any other relevant information:

## Additional context