Avoid opening up XPC connection to cfprefs by delaying WebKit framework version check.
<rdar://problem/117536662>
Pull request: https://github.com/WebKit/WebKit/pull/19595
Committed 269851@main (077e67cee2cd): <https://commits.webkit.org/269851@main> Reviewed commits have been landed. Closing PR #19595 and removing active labels.