`cast_column` makes audio decoding fail
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cc @anton-l @albertvillanova  Thanks for reporting, @patrickvonplaten.

I think the issue is related to mp3 resampling, not to `cast_column`.

You can check that `cast_column` works OK with non-mp3 audio files:
```python
from datasets import load_dataset
import datasets
ds = load_dataset("arabic_speech_corpus", split="train")
ds = ds.cast_column("audio", datasets.features.Audio(sampling_rate=16_000))
print(ds[0]["audio"])
```

I'm fixing it.
## Describe the bug

After changing the sampling rate automatic decoding fails.

## Steps to reproduce the bug
```python
from datasets import load_dataset
import datasets

ds = load_dataset("common_voice", "ab", split="train")

ds = ds.cast_column("audio", datasets.features.Audio(sampling_rate=16_000))

print(ds[0]["audio"])  # <- this fails currently
```

yields:

```
TypeError: forward() takes 2 positional arguments but 4 were given
```

## Expected results
no failure

## Actual results
Specify the actual results or traceback.

## Environment info
<!-- You can run the command `datasets-cli env` and copy-and-paste its output below. -->
Copy-and-paste the text below in your GitHub issue.

- `datasets` version: 1.13.2 (master)
- Platform: Linux-5.11.0-1019-aws-x86_64-with-glibc2.29
- Python version: 3.8.10
- PyArrow version: 5.0.0

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