Bisect FX node asserts on `ValidationException`. (#107493)
This PR introduces binary search for finding smaller validation errors, when they occur.
We do that by bisecting the sequence of `torch._assert` FX nodes recorded as the source
expression of the translation validator (TV) by `ShapeEnv.evaluate_expr` calls. Then, we
raise the error caused by the earliest node.
In summary, the changes are:
- Call `bisect` on `ValidationError` @ _torch/_dynamo/convert_frame.py_
- Implement the binary search @ _torch/fx/experimental/symbolic_shapes.py_
Edit: moved `ShapeEnv` replay-recording to #107989
Pull Request resolved: https://github.com/pytorch/pytorch/pull/107493
Approved by: https://github.com/ezyang
ghstack dependencies: #107989
