Unify the addQuantDequantNode api for inputs and outputs from quant nodes (#20677)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/20677
With new changes in IR, it is possible to insert nodes after param
nodes in graph. Thus we do not need to have two methods for inserting q-dq
nodes to input or output to quantizable nodes.
Differential Revision: D15406354
fbshipit-source-id: 1963762f434fd82877fa76a272e8520c342b6069
