[reland][quant][fix] Add bias once in conv_fused (#48593) (#48661)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/48661
Previously _conv_forward will add self.bias to the result, so bias is added twice in qat ConvBn module
this PR added a bias argument to _conv_forward and _conv_forward is called with zero bias
in ConvBn module
fixes: https://github.com/pytorch/pytorch/issues/48514
Test Plan:
Imported from OSS
Imported from OSS
Reviewed By: vkuzo
Differential Revision: D25249175
fbshipit-source-id: 4536c7545d3dcd7e8ea254368ffb7cf15118d78c
