[quant][embedding qat] Add benchmarks for QAT Embedding+EmbeddingBag (#66560)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/66560
Test Plan: Imported from OSS
Reviewed By: HDCharles
Differential Revision: D31618282
Pulled By: b-koopman
fbshipit-source-id: ebfe723cfc4004f413f157e65532d64e8d0274b3
