[quant][embedding qat] Enable quint4 in EmbeddingBag QAT workflow (#66348)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/66348
Test Plan: Imported from OSS
Reviewed By: HDCharles
Differential Revision: D31691300
Pulled By: b-koopman
fbshipit-source-id: 11bd75b608b972394fe9f7c9b7bf034af42f28b5
