Port existing heuristics to TD framework (#107071)
This PR looks big, but it's mostly just refactorings with a bit of dead code deletion. Exceptions are:
- Some metric emissions were changed to comply with the new TD format
- Some logging changes
- We now run tests in three batches (highly_relevant, probably_relevant, unranked_relevance) instead of the previous two (prioritized and general)
Refactorings done:
- Moves all test reordering code to the new TD framework
- Refactors run_test.py to cleanly support multiple levels of test priorities
- Deletes some dead code that was originally written for logging
Pull Request resolved: https://github.com/pytorch/pytorch/pull/107071
Approved by: https://github.com/clee2000, https://github.com/huydhn
