Move torchbench model configuration into a YAML file. (#120299)
This PR moves other aspects of torchbench's model configuration (e.g. batch size,
tolerance requirements, etc.) into a new YAML file: `torchbench.yaml`. It also merges the
recently added `torchbench_skip_models.yaml` file inside the `skip` key.
This is an effort so that external consumers are able to easily replicate the performance
results and coverage results from the PyTorch HUD.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/120299
Approved by: https://github.com/jansel
