Add two WPTs where the descendant has aspect-ratio and percentage height.
The two testcases are adapted from Daniel Holbert's testcase 1 and 2 in the bug.
Both are fixed by bug 1909761.
Differential Revision: https://phabricator.services.mozilla.com/D220363
bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1748339
gecko-commit: ec726d591b2f6ad7b1991444014156ed2bf921e7
gecko-reviewers: dholbert