add Shuffler

[keunwoochoi]

Please read through our contribution guide prior to
creating your pull request.

• If you are adding a new node, ensure you read that section in the contribution guide, as it includes requirements for
  functionality and testing.

Fixes #{issue number}

Changes

[ramanishsingh]

Thanks for adding the shuffler node.
Just one very minor comment.

Looks good :)

[keunwoochoi]

nice! thanks for the review. just made the requested change.

[ramanishsingh]

Thanks, running final CI for testing.

[pytorch-bot]

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As of commit 3409b6c with merge base 088e434 ():
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