fx quant: make forked subgraph rewriter preserve stack trace (#71858)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/71858
Makes the forked subgraph rewriter code path preserve stack traces.
The strategy is pretty simple for now:
1. find any specified stack trace in pattern graph
2. if found, copy this stack trace to every node in replacement graph
If more complicated logic is needed in the future, we can address it
at a later time.
Test Plan:
```
python test/test_quantization.py TestQuantizeFx.test_stack_trace_preserved_subgraph_rewriter
```
Imported from OSS
Reviewed By: jerryzh168
Differential Revision: D33791740
fbshipit-source-id: 38bb4885549a9f954278c6c14fa41f58f1d5f7b7
(cherry picked from commit 5cc32a87ce62ad9a1c8d2240cfe630cbf1cc838d)
