add sam to dense_models, retitle issues (#1688)
Summary:
Fixes https://github.com/pytorch/benchmark/actions/runs/5075948281/jobs/9117655476
Retitles issues to optim
Pull Request resolved: https://github.com/pytorch/benchmark/pull/1688
Reviewed By: xuzhao9
Differential Revision: D46189500
Pulled By: janeyx99
fbshipit-source-id: 43fbb6c6852abe2d35fa84d96cca419652cf6ef4
