Add support for hf datasets summarization

[Prikshit7766]

This PR aims on Adding Support of HF dataset for summarization task.

Checklist:

• I've added Google style docstrings to my code.
• I've used pydantic for typing when/where necessary.
• I have linted my code
• I have added tests to cover my changes.

[JulesBelveze]

Few comments:

1. It would be better to pass a parameter task when instantiating the HuggingFaceDataset. This will go in hand with the others *Dataset.
2. It would be great to have a HuggingFaceData.load_data method that will then redirect to the loading method according to the task. That way we will always call the same function from the Harness.
3. Please add SummarizationSample to the TypeVar Sample

[RakshitKhajuria]

Few comments:

1. It would be better to pass a parameter task when instantiating the HuggingFaceDataset. This will go in hand with the others *Dataset.
2. It would be great to have a HuggingFaceData.load_data method that will then redirect to the loading method according to the task. That way we will always call the same function from the Harness.
3. Please add SummarizationSample to the TypeVar Sample

Thanks for the review @JulesBelveze :)

[JulesBelveze]

LGTM