Annotations only belong to a single PDF page, so to support some future work, tighten up the annotation repaint code accordingly.
<rdar://problem/127915821>
Pull request: https://github.com/WebKit/WebKit/pull/28423
Committed 278658@main (b64c3ed80595): <https://commits.webkit.org/278658@main> Reviewed commits have been landed. Closing PR #28423 and removing active labels.