WPT import https://crrev.com/c/1190123 introduced new failures in external/wpt/html/rendering/non-replaced-elements/the-fieldset-element-0:

List of new failures:
external/wpt/html/rendering/non-replaced-elements/the-fieldset-element-0/fieldset-vertical.html [ Failure ]

This import contains upstream changes from 08095d6cdab52460cd04fc7640ffc42b1c8325e9 to 5356c365a8a82003dc4d7e636d33b57827458781:
HTML: add suggested reviewers fieldset rendering tests: https://github.com/web-platform-tests/wpt/commit/5356c365a8a82003dc4d7e636d33b57827458781 [affecting this directory]
HTML: test fieldset rendering with vertical writing-mode: https://github.com/web-platform-tests/wpt/commit/76894623a2501f8a38540f9b174cadcf56a8d79d [affecting this directory]
Update webkit-pseudo-element test with correct spec link. (#12683): https://github.com/web-platform-tests/wpt/commit/04d0c8c0d8f8f9f0e91881be731fd344477573dc
Update interfaces/background-fetch.idl (#12688): https://github.com/web-platform-tests/wpt/commit/e612624398a3c0b1ffe4647374f4b33275cbf11b
Update interfaces/webxr.idl (#12686): https://github.com/web-platform-tests/wpt/commit/95b99a79a17dfa671de718294ad4c621626c5149