Store test filename in test report path (#52791)
Summary:
This way, we can have a mapping from the test files we directly execute (the tests [here](https://github.com/pytorch/pytorch/blob/master/test/run_test.py#L20)) to the test suites that we store data for in XML reports.
This will come in use later for categorizing the tests we run in CI.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/52791
Reviewed By: samestep
Differential Revision: D26655086
Pulled By: janeyx99
fbshipit-source-id: 94be32f80d7bc0ea1a7a11d4c4b1d3d8e774c5ea
