testing: Add -v flag when running individual test

[NickCrews]

Thanks for the help here. Love the improvements you have been making. Especially the improved test discovery, result streaming, and test debugging support!

Just a possible UX improvement I would love. When I run an individual test with the UI:

I get this in the testing panel:

        first_few = list(
            result[["record_id_l", "record_id_r"]]
            .head(len(first_few_expected))
            .to_pandas()
            .itertuples(index=False, name=None)
        )
>       assert first_few_expected == list(first_few)
E       assert [(0, 1), (0, ..., (1, 3), ...] == [(0, 0), (0, ..., (1, 0), ...]
E         
E         At index 0 diff: (0, 1) != (0, 0)
E         Use -v to get more diff

mismo/block/tests/test_block_array.py:92: AssertionError
=========================== short test summary info ============================
FAILED mismo/block/tests/test_block_array.py::test_benchmark_array_blocker[n=10000,k=5,npairs=39,990]
============================== 1 failed in 0.24s ===============================
Finished running tests!

It would be awesome if the extension added the -v flag for me, so I would by default get the full diff. When I select a single test, that is probably because that individual case is failing, and so I want as much info as possible.

When running multiple tests, I think it makes sense to leave the behavior as is, keep it a bit more succinct, and leave the -v flag off.

[github-actions]

Thanks for the feature request! We are going to give the community 60 days from when this issue was created to provide 7 👍 upvotes on the opening comment to gauge general interest in this idea. If there's enough upvotes then we will consider this feature request in our future planning. If there's unfortunately not enough upvotes then we will close this issue.

[brettcannon]

Thank you for submitting your feature request and everyone who considered it! Unfortunately, this issue did not receive enough votes over the allotted time, and so we are closing the issue.