[InteractionRegions] Add support for all non-uniform border-radius
Pull request: https://github.com/WebKit/WebKit/pull/21878
<rdar://problem/118884255>
Committed 272377@main (b52ad6b19d1a): <https://commits.webkit.org/272377@main> Reviewed commits have been landed. Closing PR #21878 and removing active labels.