load_dataset imageflder for aws s3 path 
### Feature request

I would like to load a dataset from S3 using the imagefolder option 
something like 
`dataset = datasets.load_dataset('imagefolder', data_dir='s3://.../lsun/train/bedroom', fs=S3FileSystem(), streaming=True)  `

### Motivation

no need of data_files

### Your contribution

no experience with this