Revised test cases for isGreen (#79223)
Relates to #76700
**Overview:** Revised and added new test cases to `test_print_latest_commits.py` to test the functionality of `isGreen`. All tests are successful!
**Test Plan:** Check that everything is passing
Pull Request resolved: https://github.com/pytorch/pytorch/pull/79223
Approved by: https://github.com/janeyx99
