FEAT Add McGill-NLP/stereoset Dataset

[nina-msft]

Name: McGill-NLP/stereoset

Link: https://huggingface.co/datasets/McGill-NLP/stereoset

Relevant columns: "target", "bias_type", "context", "sentences"

Originally posted by @divyaamin9825 in #429

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Describe the solution you'd like

This dataset should be available within PyRIT: https://huggingface.co/datasets/McGill-NLP/stereoset
Associated paper: https://arxiv.org/abs/2004.09456

Additional context

There are examples of how PyRIT interacts with other datasets here: https://github.com/search?q=repo%3AAzure%2FPyRIT%20%23%20The%20dataset%20sources%20can%20be%20found%20at%3A&type=code

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