pytorch

9bd14da6 - ns for fx: additional bugfix for user defined functions (#56762)

ns for fx: additional bugfix for user defined functions (#56762) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/56762 Adds a test case for wrapped sigmoid, and fixes the following issues to make it pass in NS: * allows comparing between x.sigmoid() and torch.sigmoid(x), if they are related * allows dtype cast from FP32_OR_INT8 to FP32, via dequantize (this will be improved later) Test Plan: ``` python test/test_quantization.py TestFXNumericSuiteCoreAPIs.test_user_defined_function ``` Imported from OSS Reviewed By: jerryzh168 Differential Revision: D27960766 fbshipit-source-id: 02935d2f400aa0b8f3d51bbf664a6c8ca89aa811