Logging suggestions upon Dynamo error do not log

[awgu]

When I hit an error during compilation, I see a message like:

torch._dynamo.exc.TorchRuntimeError: 

from user code:
   File "/.../transformers/src/transformers/models/t5/modeling_t5.py", line 559, in <resume in forward>
    scores += position_bias_masked

Set torch._dynamo.config.verbose=True or TORCHDYNAMO_VERBOSE=1 for more information

However, setting torch._dynamo.config.verbose=True and running with TORCHDYNAMO_VERBOSE=1 both do not print any logs (though, running with TORCH_LOGS=dynamo does).

1. Is the suggestion in the error message out of date?
2. Where can we find the current selection of logging options and how to enable them?
   Maybe https://pytorch.org/docs/stable/dynamo/troubleshooting.html is not up to date?

cc @ezyang @soumith @msaroufim @wconstab @ngimel @bdhirsh

[wconstab]

yea, this is out of date info. You want TORCH_LOGS=+dynamo for debug, or drop the + for info. (note: if you type something wrong into TORCH_LOGS itll tell you the valid component options you can choose from, and i am just saying dynamo from memory but could be wrong)

@mlazos do you want to update the docs? or else i can help with that.

[mlazos]

Yeah I can update the docs, I was planning on doing it for the docathon but I can start now since people are making mistakes with it.

Oh it's just the error message, I can PR that right now.