Historically, tournament client may have written incorrect `OnlineID`
values. We wanted to use `ShortName` to re-fetch the ruleset. This test
ensures this flow is working correctly.
This was definitely added at someone's request, since I wouldn't have
put it here. But it's displayed below in the details section already and
also not displayed in the updated "wedge" in the new design.
See https://github.com/ppy/osu/discussions/17537 for discussion.