[quant] Fix fusion pattern for add_relu (#39367)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/39367
We shouldn't match `%alpha` argument since it could be used by multiple functions
Test Plan: Imported from OSS
Differential Revision: D21829295
fbshipit-source-id: 6daa320a4b56df4e142b8e02e04a3ecb36284d1b
