Improve TORCHDYNAMO_EXTENDED_DEBUG for GuardOnDataDependentSymNode (#119412)
This PR substantially improves the error reporting for GuardOnDataDependentSymNode in the following ways:
* The GuardOnDataDependentSymNode error message is rewritten for clarity, and contains a link to a new doc on how to resolve these issues https://docs.google.com/document/d/1HSuTTVvYH1pTew89Rtpeu84Ht3nQEFTYhAX3Ypa_xJs/edit#heading=h.44gwi83jepaj
* We support `TORCHDYNAMO_EXTENDED_DEBUG_CREATE_SYMBOL`, which lets you specify a symbol name to get detailed debug information when it is logged (e.g., the full backtrace and user backtrace of the symbol creation). The exact symbols that you may be interested in our now explicitly spelled out in the error message.
* We support `TORCHDYNAMO_EXTENDED_DEBUG_CPP` which enables reporting C++ backtraces whenever we would report a backtrace.
Signed-off-by: Edward Z. Yang <ezyang@meta.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/119412
Approved by: https://github.com/avikchaudhuri
ghstack dependencies: #117356
