[ATen][qembeddingbag] Avoid tensor refcount bumps (#55023)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/55023
Test Plan: CI
Reviewed By: swolchok
Differential Revision: D27453856
fbshipit-source-id: f2b5ed97d3cc179baba4c158871a0225e3ba9030
