[local lint] Remove success checks in tests (#58490)
Summary:
Testing for both that a lint job ran and that it was successful depends
on having lint pass for the PR, which can create confusion if it doesn't
(i.e. a flake8 failure also causes this job to fail, and it's not
immediately clear why). With this PR we just check for the presence of
job names to see that something ran.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/58490
Reviewed By: samestep
Differential Revision: D28511229
Pulled By: driazati
fbshipit-source-id: 3036deff9f9d0ef2e78b44a9a43b342acdcfa296
