Add absolute latency to dashboard (#88790)
Add absolute latency to dashboard, as requested by https://github.com/pytorch/torchdynamo/issues/1833#issuecomment-1302742914
Tested by setting `run.sh` to
```
# Setup the output directory
rm -rf ../test-dynamo-runner-logs-7/
mkdir ../test-dynamo-runner-logs-7/
# Commands for torchbench for device=cuda, dtype=float32 for training and for performance testing
python benchmarks/dynamo/torchbench.py --performance --float32 -dcuda --output=../test-dynamo-runner-logs-7//inductor_torchbench_float32_training_cuda_performance.csv --training --inductor --no-skip --dashboard --only mobilenet_v2 --cold_start_latency
# Commands for torchbench for device=cuda, dtype=float32 for training and for accuracy testing
python benchmarks/dynamo/torchbench.py --accuracy --float32 -dcuda --output=../test-dynamo-runner-logs-7//inductor_torchbench_float32_training_cuda_accuracy.csv --training --inductor --no-skip --dashboard --only mobilenet_v2
```
and running `python benchmarks/dynamo/runner.py --output-dir ../test-dynamo-runner-logs-7/ --dashboard-archive-path /data/home/williamwen/dynamo-runner-logs-copy --training --run --compilers inductor --flag-compilers inductor --suites torchbench --update-dashboard` (need to comment out the `generate_commands` line and change the github issue ID from 681 to something else).
Sample comment: https://github.com/pytorch/torchdynamo/issues/1831#issuecomment-1309645562
NOTE: this change breaks processing old logs.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/88790
Approved by: https://github.com/anijain2305
