Import WPT css-text-decor/text-emphasis-style-property-010* tests
<rdar://problem/107709906>
Pull request: https://github.com/WebKit/WebKit/pull/12459
Committed 262671@main (8949b6a635de): <https://commits.webkit.org/262671@main> Reviewed commits have been landed. Closing PR #12459 and removing active labels.