InteractionRegions: configure guard layers differently than occlusions
<rdar://problem/108847192>
Pull request: https://github.com/WebKit/WebKit/pull/13474
Committed 263730@main (ee57472bbda1): <https://commits.webkit.org/263730@main> Reviewed commits have been landed. Closing PR #13474 and removing active labels.
*** Bug 256342 has been marked as a duplicate of this bug. ***