Turns out we don't have all the uievents/mouse interop WPTs checked out. Let's fix that.
<rdar://problem/115938951>
Pull request: https://github.com/WebKit/WebKit/pull/18134
Committed 268395@main (4b0bb99fb8e2): <https://commits.webkit.org/268395@main> Reviewed commits have been landed. Closing PR #18134 and removing active labels.