[quant] Factor out common operator configs from native.py (#78407)
Summary:
Some helper functions that generate operator configs based on dtype_configs are reused in native backend and tensorrt, so we
factor out this part to a util file: common_operator_configs.py
Test Plan: buck test mode/opt deeplearning/trt/fx2trt_oss/test/quant:test_quant_trt
Differential Revision: D36728359
Pull Request resolved: https://github.com/pytorch/pytorch/pull/78407
Approved by: https://github.com/vkuzo, https://github.com/andrewor14
