Store test file in S3 as well for every TestSuite (#52869)
Summary:
We want to store the file names that triggers each test suite so that we can use this data for categorizing those test files.
~~After considering several solutions, this one is the most backwards compatible, and the current test cases in test_testing.py for print test stats don't break.~~
The previous plan did not work, as there are multiple Python test jobs that spawn the same suites. Instead, the new S3 format will store test files (e.g., `test_nn` and `distributed/test_distributed_fork`) which will contain the suites they spawn, which will contain the test cases run within the suite. (Currently, there is no top layer of test files.)
Because of this major structural change, a lot of changes have now been made (thank you samestep!) to test_history.py and print_test_stats.py to make this new format backwards compatible.
Old test plan:
Make sure that the data is as expected in S3 after https://github.com/pytorch/pytorch/pull/52873 finishes.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/52869
Test Plan: Added tests to test_testing.py which pass, and CI.
Reviewed By: samestep
Differential Revision: D26672561
Pulled By: janeyx99
fbshipit-source-id: f46b91e16c1d9de5e0cb9bfa648b6448d979257e
