[Quant][fx] Fix get_default_qconfig_dict for fused modules
Summary: Calling `prepare_fx` with `get_default_qconfig_dict`
failed for models with fused modules, such as `ConvReLU2d`.
This commit fixes this by adding qconfig entries for ReLU
and BatchNorm as well.
Test Plan:
python test/test_quantization.py TestQuantizeFx.test_qconfig_dict_with_fused_modules
Reviewers: jerryzh168
Subscribers: jerryzh168, vkuzo
Issue: https://github.com/pytorch/pytorch/issues/75825
Pull Request resolved: https://github.com/pytorch/pytorch/pull/75838
Approved by: https://github.com/jerryzh168
