ns for fx: add F.conv2d and F.conv3d weight extraction (#55287)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/55287
Adds support for extracting weights from F.conv2d and F.conv3d.
F.conv1d and the fused variants are saved for future PRs.
Test Plan:
```
python test/test_quantization.py TestFXNumericSuiteCoreAPIs.test_extract_weights_conv_fun
```
Imported from OSS
Reviewed By: hx89
Differential Revision: D27575424
fbshipit-source-id: e945912d7d0ab320f47cab30d00d60ddb7497158
