[JIT] Enable conv-add-relu fusion as a part of frozen graph optimization (#56580)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/56580
Turn on conv-add-relu fusion as default for the frozen graph optimization.
Test Plan:
```
python test/test_jit.py -k test_freeze_conv_relu_fusion
```
Reviewed By: nikithamalgifb
Differential Revision: D27915515
Pulled By: desertfire
fbshipit-source-id: 9a68d2a6aba70e697258c02c4fd3f3fbfc9fb8f6
