dbr quant: record dag of non-quantizeable ops (#71551)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/71551
This PR makes DBR quant record the DAG of non-quantizeable
ops. Having this will enable us to analyze the entire traced
graph of pytorch ops, regardless of whether they support quantization
or not. That, in turn, will enable analysis of uses of each op,
allowing us to safely determine whether a subgraph of ops can be
fused or not.
In future PRs, this functionality will be used to implement function
fusion.
Test Plan:
```
python test/test_quantization.py -k DBR
```
Reviewed By: jerryzh168
Differential Revision: D33684130
Pulled By: vkuzo
fbshipit-source-id: 497d9882f0670a36eef2a0900ea2517c82addf66
(cherry picked from commit b0d48a8e66a42213b353458fc86b2eb537f43828)
