Implement Entropy methods for Binomial and Multinomial distributions (#67609)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/60866.
Because it seems https://github.com/pytorch/pytorch/pull/61719 shows no response for a long time, I made this PR.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/67609
Reviewed By: malfet
Differential Revision: D32310866
Pulled By: mruberry
fbshipit-source-id: b3a8dde452f448e5981f5405f5f925f860b0d84f
