[quant][embedding qat] eager mode QAT for Embeddings (#66429)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/66429
Test Plan: Imported from OSS
Reviewed By: HDCharles, supriyar
Differential Revision: D31618284
Pulled By: b-koopman
fbshipit-source-id: 0c0e2e86b98da9f29e9b2fc2a35c59424f94cbba
