svg-mouse-listener.html crashtest is outside the crashtests dir

[cookiecrook]

@kevers-google This crashtest is the only one outside the crashtests directory. Is there a good reason? If not, will you align with the other files? Thanks.

https://github.com/web-platform-tests/wpt/blob/master/accessibility/svg-mouse-listener.html

https://wpt.fyi/results/accessibility?label=master&label=experimental&aligned&q=label%3Aaccessibility