[dynamo] check buffers when checking accuracy (#91037)
Tested by running `python benchmarks/dynamo/torchbench.py --accuracy --float32 -dcuda --output=inductor_torchbench_float32_training_cuda_performance.csv --training --inductor --no-skip --dashboard --only mobilenet_v2 --cold_start_latency` and breakpointing after the changes to inspect buffers.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/91037
Approved by: https://github.com/anijain2305
