Fix deprecation warning for return_all_scores
Author: ogabrielluiz
Pull request: yes

# What does this PR do?
Fixes the deprecation warning for return_all_scores to reflect what the code is doing.
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Fixes # (issue)
#19207 

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Comments:
_The documentation is not available anymore as the PR was closed or merged._

For the quality test you can run 

``` 
pip install transformers[dev] # or pip install -e .[dev] in the directory
make fixup
```
And push the changes.

Pinging @gante in turn, who will know better than me :-)