Convert basic vertical print tests to WPT tests.
Heavily inspired by tkent's work on sideways tests in
crrev.com/c/5953408
Change-Id: I90380a3f0516fea5b50b7099e1537b14c5854c4b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5965017
Commit-Queue: Kent Tamura tkent@chromium.org
Commit-Queue: Morten Stenshorne mstensho@chromium.org
Reviewed-by: Kent Tamura tkent@chromium.org
Cr-Commit-Position: refs/heads/main@{#1373793}