Add dynamo test configuration (#80342)
This test configuration runs PyTorch's test suite under torchdynamo.
Once stabilized, we will make this default and remove this particular
CI job.
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/80342
Approved by: https://github.com/anijain2305
