Add the fusion of quantized batchnorm and relu (#34795)
Summary:
As title, we want to support the BN2d_relu and BN3d_relu
Test to be added!
Pull Request resolved: https://github.com/pytorch/pytorch/pull/34795
Differential Revision: D20464855
Pulled By: lly-zero-one
fbshipit-source-id: 57090d427053c9c94c1b387b33740a7e61261a9d
