[scroll-anchoring] A scroll anchoring adjustment during a momentum scroll stops the scroll
<rdar://problem/118476758>
Pull request: https://github.com/WebKit/WebKit/pull/20559
Committed 271517@main (bdce1d6d1b68): <https://commits.webkit.org/271517@main> Reviewed commits have been landed. Closing PR #20559 and removing active labels.