[quant][graphmode][fx] Support input_quantized_idxs and output_quantized_idxs in the new convert (#68042)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/68042
att
Also added test cases from TestQuantizeFx which tests all combinations of {fp32, int8} input and output override
Test Plan:
```
python test/fx2trt/test_quant_trt.py TestConvertFxDoNotUse
```
Imported from OSS
Reviewed By: vkuzo
Differential Revision: D32271511
fbshipit-source-id: 87ffc00069aaff7d1c455cdd97fac82b11aa4527
