ns for fx: make `call_method` nodes work in NS APIs (#56196)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/56196
Enables `call_method` nodes to work in NS APIs for unshadowed
and shadowed activations.
Test Plan:
```
python test/test_quantization.py TestFXNumericSuiteCoreAPIs.test_op_io_dtype_coverage
python test/test_quantization.py TestFXNumericSuiteCoreAPIs.test_match_activations_meth_ptq
python test/test_quantization.py TestFXNumericSuiteCoreAPIs.test_add_shadow_loggers_meth_ptq
```
Imported from OSS
Reviewed By: jerryzh168
Differential Revision: D27805335
fbshipit-source-id: 39b9c02c5c5faf098f2dd4f36d1ea8296d51a63c
