Due to AppKit changes in https://stashweb.sd.apple.com/projects/COCOA/repos/appkit/commits/64afa8f0294086fdba5b3c36c7e1582171b68a73, we need to use legacy scrolling for WK1 testing.
rdar://92772409
Pull request: https://github.com/WebKit/WebKit/pull/1834
Committed 251898@main (bf8293a1d8a7): <https://commits.webkit.org/251898@main> Reviewed commits have been landed. Closing PR #1834 and removing active labels.