ns for fx: update graph matching to not match nodes with equal types (#52402)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/52402
Before this PR, any pair of subgraphs with base nodes of equal
types matched.
While sometimes this is useful, this should be off by default to
properly handle user defined modules and functions, for which we do not
know how to extract weights or cast to the right input type.
In a future PR, we can add hooks to turn on matching for nodes
of equal types, for the situations where it makes sense.
Test Plan:
```
python test/test_quantization.py TestFXGraphMatcher.test_nodes_with_equal_types_do_not_get_matched
```
Imported from OSS
Reviewed By: hx89
Differential Revision: D26499848
fbshipit-source-id: 5818b88eb7fd8ed36390f60aa1a18228bb50507e
