A few usability improvements for the dynamo benchmarks. (#92713)
--diff_main renamed to --diff-branch BRANCH and now works again
Summary table splits results per branch.
csv output now has column with branch name when run in this mode
Added --progress flag so you can track how many models are going to be
run.
Example output:
```
$ python benchmarks/dynamo/torchbench.py --quiet --performance --backend inductor --float16 --batch-size-file $(realpath benchmarks/dynamo/torchbench_models_list.txt) --filter 'alexnet|vgg16' --progress --diff viable/strict
Running model 1/2
batch size: 1024
cuda eval alexnet dynamo_bench_diff_branch 1.251x p=0.00
cuda eval alexnet viable/strict 1.251x p=0.00
Running model 2/2
batch size: 128
cuda eval vgg16 dynamo_bench_diff_branch 1.344x p=0.00
cuda eval vgg16 viable/strict 1.342x p=0.00
Summary for tag=dynamo_bench_diff_branch:
speedup gmean=1.30x mean=1.30x
abs_latency gmean=24.09x mean=25.26x
compilation_latency mean=2.0 seconds
compression_ratio mean=0.9x
Summary for tag=viable/strict:
speedup gmean=1.30x mean=1.30x
abs_latency gmean=24.11x mean=25.29x
compilation_latency mean=0.5 seconds
compression_ratio mean=1.0x
```
Pull Request resolved: https://github.com/pytorch/pytorch/pull/92713
Approved by: https://github.com/jansel
