pytorch

60665ace - [quant] Add optimized approach to calculate qparams for qembedding_bag (#45149)

[quant] Add optimized approach to calculate qparams for qembedding_bag (#45149) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/45149 The choose_qparams_optimized calculates the the optimized qparams. It uses a greedy approach to nudge the min and max and calculate the l2 norm and tries to minimize the quant error by doing `torch.norm(x-fake_quant(x,s,z))` Test Plan: Imported from OSS Reviewed By: raghuramank100 Differential Revision: D23848060 fbshipit-source-id: c6c57c9bb07664c3f1c87dd7664543e09f634aee