Add named_buffers to torchdynamo nn_module (#87644)
Fixes: https://github.com/pytorch/torchdynamo/issues/1738
cc @jansel @lezcano @fdrocha @mlazos @soumith @voznesenskym @yanboliang @penguinwu @anijain2305
Pull Request resolved: https://github.com/pytorch/pytorch/pull/87644
Approved by: https://github.com/jansel
