ns for fx: handling for user functions in weight and unshadowed act APIs (#56292)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/56292
Adds hooks for specifying user defined functions to NS weight and
unshadowed activation APIs.
Adding it to shadowed activation APIs will be a bit more work, upcoming
in a separate PR.
Test Plan:
```
python test/test_quantization.py TestFXNumericSuiteCoreAPIs.test_user_defined_function
```
Imported from OSS
Reviewed By: jerryzh168
Differential Revision: D27830409
fbshipit-source-id: 6bbddc3062c0b3e412a3147244795319c0785a92
