More dynamo dashboard improvements (#89155)
A number of dashboard improvements:
- Add accuracy failures to warnings section
- Add regression detection to all metrics (speedup, compile time, peak memory), not just accuracy
- Add testing flag to update-dashboard to prevent image/comment uploads
- Add section for comparing summary statistics (passrate, speedup) between 2 most recent reports
- Show names of reports for summary stats diff and regression detection sections
- Remove metric graphs from the comment (they can still be found in the generated text file)
Sample comment: https://github.com/pytorch/torchdynamo/issues/1831#issuecomment-1317565972
Pull Request resolved: https://github.com/pytorch/pytorch/pull/89155
Approved by: https://github.com/anijain2305
