ns for fx: add ref_node_target_type (#62685)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/62685
Adds a `ref_node_target_type` field to hold the string type
of the base node. This is needed because in some cases
the previous node does not match ref_node (if we have observers,
or if we are logging inputs), and it is useful to know the type
of ref_node.
Test Plan:
```
python test/test_quantization.py TestFXNumericSuiteCoreAPIs
```
Imported from OSS
Reviewed By: hx89
Differential Revision: D30082947
fbshipit-source-id: 98ded7b25a5d8d5ea820e0ef62c3799b65c3fc77
