re-enable disabled test via commit message
Fixes #[74132](https://github.com/pytorch/pytorch/issues/74132)
Allows for re-enabling disabled tests using commit messages. Previously, this done in the PR body by writing something similar to "Fixes #<issue number that disables a test>" and the test would be re-enabled. Now, this re-enabling can be done in either the commit message or the PR body.
Test Plan
One of the commits in this PR contains "fixes 74223" (the # is ommited because github would mistakenly close that issue), which is a disabled test belonging to the periodic job linux-bionic-cuda11.5-py3.7-gcc7. Looking at the logs of this job will show that this test (test_exception_all) was run in the job.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/74981
Approved by: https://github.com/seemethere, https://github.com/janeyx99
