ns for fx: weight extraction for nni.ConvReLU2d (#54335)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/54335
Simple fix to enable weight extraction for nni.ConvReLU2d.
Note: this module only appears if the internal GraphModule APIs are
called, so we add testing for this path.
Test Plan:
```
python test/test_quantization.py TestFXNumericSuiteCoreAPIs.test_extract_weights_mod
```
Imported from OSS
Reviewed By: hx89
Differential Revision: D27192844
fbshipit-source-id: 923cf63e29e4638fd77ca42e69aedb15fb20a330
