InteractionRegions: elements with explicitly set `border-radius` should not get the default radius
<rdar://problem/116815739>
Pull request: https://github.com/WebKit/WebKit/pull/19507
Committed 269755@main (e6990174db14): <https://commits.webkit.org/269755@main> Reviewed commits have been landed. Closing PR #19507 and removing active labels.