Add quantized CELU operator by adding additional parameters to quantized ELU (#39199)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/39199
Test Plan: Imported from OSS
Differential Revision: D21771202
Pulled By: durumu
fbshipit-source-id: 910de6202fa3d5780497c5bf85208568a09297dd
