Retriage external/wpt/css/css-fonts/standard-font-family.html

The test was added by https://github.com/web-platform-tests/wpt/pull/20415, in together with all the other standard-font-family-*.html tests for the ui-* font keywords.

Therefore, the test failure should be tracked by the same bug as the other tests.

Bug: 1240186, 1029069
Change-Id: I76eac560c656b88bc376dc263c8748d2d3343a83
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3871923


Commit-Queue: David Baron <dbaron@chromium.org>
Reviewed-by: David Baron <dbaron@chromium.org>
Auto-Submit: Xiaocheng Hu <xiaochengh@chromium.org>
Commit-Queue: Xiaocheng Hu <xiaochengh@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1042726}