Re-import css/css-counter-styles/cssom WPT tests
<rdar://problem/107223884>
Pull request: https://github.com/WebKit/WebKit/pull/11972
Pull request: https://github.com/apple/WebKit/pull/494
Committed 262150@main (28456a7a2c29): <https://commits.webkit.org/262150@main> Reviewed commits have been landed. Closing PR #11972 and removing active labels.