load_dataset for winoground returning decoding error
Hi ! This dataset structure (image + labels in a JSON file) is not supported yet, though we're adding support for this in  in #4069 

The following structure will be supported soon:
```
metadata.json
images/
     image0.png
     image1.png
    ...
```
Where `metadata.json` is a JSON Lines file with labels or other metadata, and each line must have a "file_name" field with the name of the image file.

For the moment are only supported:
- JSON files only
- image files only

Since this dataset is a mix of the two, at the moment it fails trying to read the images as JSON.

Therefore to be able to load this dataset we need to wait for the new structure to be supported (very soon ^^), or add a dataset script in the repository that reads both the JSON and the images cc @TristanThrush 

## Describe the bug
I am trying to use datasets to load winoground and I'm getting a JSON decoding error.

## Steps to reproduce the bug
```python
from datasets import load_dataset
token = 'hf_XXXXX' # my HF access token
datasets = load_dataset('facebook/winoground', use_auth_token=token)
```

## Expected results
I downloaded images.zip and examples.jsonl manually. I was expecting to have some trouble decoding json so I didn't use jsonlines but instead was able to get a complete set of 400 examples by doing
```python
import json

with open('examples.jsonl', 'r') as f:
    examples = f.read().split('\n')

# Thinking this would error if the JSON is not utf-8 encoded
json_data = [json.loads(x) for x in examples]
print(json_data[-1])
```
and I see
```python
{'caption_0': 'someone is overdoing it',
 'caption_1': 'someone is doing it over',
 'collapsed_tag': 'Relation',
 'id': 399,
 'image_0': 'ex_399_img_0',
 'image_1': 'ex_399_img_1',
 'num_main_preds': 1,
 'secondary_tag': 'Morpheme-Level',
 'tag': 'Scope, Preposition'}

```
so I'm not sure what's going on here honestly. The file `examples.jsonl` doesn't have non-UTF-8 encoded text.

## Actual results
During the split operation after downloading, datasets encounters an error in the JSON ([trace](https://gist.github.com/odellus/e55d390ca203386bf551f38e0c63a46b) abbreviated for brevity).
```
datasets/packaged_modules/json/json.py:144 in Json._generate_tables(self, files)
...
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xff in position 0: invalid start byte
```


## Environment info
<!-- You can run the command `datasets-cli env` and copy-and-paste its output below. -->
- `datasets` version: 1.18.4
- Platform: Linux-5.13.0-39-generic-x86_64-with-glibc2.29
- Python version: 3.8.10
- PyArrow version: 7.0.0

load_dataset for winoground returning decoding error 
 ## Describe the bug
I am trying to use datasets to load winoground and I'm getting a JSON decoding error.

## Steps to reproduce the bug
```python
from datasets import load_dataset
token = 'hf_XXXXX' # my HF access token
datasets = load_dataset('facebook/winoground', use_auth_token=token)
```

## Expected results
I downloaded images.zip and examples.jsonl manually. I was expecting to have some trouble decoding json so I didn't use jsonlines but instead was able to get a complete set of 400 examples by doing
```python
import json

with open('examples.jsonl', 'r') as f:
    examples = f.read().split('\n')

# Thinking this would error if the JSON is not utf-8 encoded
json_data = [json.loads(x) for x in examples]
print(json_data[-1])
```
and I see
```python
{'caption_0': 'someone is overdoing it',
 'caption_1': 'someone is doing it over',
 'collapsed_tag': 'Relation',
 'id': 399,
 'image_0': 'ex_399_img_0',
 'image_1': 'ex_399_img_1',
 'num_main_preds': 1,
 'secondary_tag': 'Morpheme-Level',
 'tag': 'Scope, Preposition'}

```
so I'm not sure what's going on here honestly. The file `examples.jsonl` doesn't have non-UTF-8 encoded text.

## Actual results
During the split operation after downloading, datasets encounters an error in the JSON ([trace](https://gist.github.com/odellus/e55d390ca203386bf551f38e0c63a46b) abbreviated for brevity).
```
datasets/packaged_modules/json/json.py:144 in Json._generate_tables(self, files)
...
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xff in position 0: invalid start byte
```


## Environment info
<!-- You can run the command `datasets-cli env` and copy-and-paste its output below. -->
- `datasets` version: 1.18.4
- Platform: Linux-5.13.0-39-generic-x86_64-with-glibc2.29
- Python version: 3.8.10
- PyArrow version: 7.0.0
 
 Hi ! This dataset structure (image + labels in a JSON file) is not supported yet, though we're adding support for this in  in #4069 

The following structure will be supported soon:
```
metadata.json
images/
     image0.png
     image1.png
    ...
```
Where `metadata.json` is a JSON Lines file with labels or other metadata, and each line must have a "file_name" field with the name of the image file.

For the moment are only supported:
- JSON files only
- image files only

Since this dataset is a mix of the two, at the moment it fails trying to read the images as JSON.

Therefore to be able to load this dataset we need to wait for the new structure to be supported (very soon ^^), or add a dataset script in the repository that reads both the JSON and the images cc @TristanThrush 
