ns for fx: add functional conv-relu fusion support (#55433)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/55433
Makes `F.conv{n}d -> F.relu` patterns work for NS weight
extraction.
Test Plan:
```
python test/test_quantization.py TestFXNumericSuiteCoreAPIs.test_extract_weights_conv_fun
```
Imported from OSS
Reviewed By: hx89
Differential Revision: D27622417
fbshipit-source-id: d3ee08bd19865874cff3776c3b69e232fdfc5912
