Move scroll-markers property parsing tests to wpt_internal
As scroll-markers property is not specced yet,
move the parsing tests to wpt_internal.
Bug: 332396355
Change-Id: I23bb3f2e1f4a8a1ccd2ce0ba62b7995d5a5bbadc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5546429
Commit-Queue: Daniil Sakhapov sakhapov@chromium.org
Reviewed-by: Rune Lillesveen futhark@chromium.org
Cr-Commit-Position: refs/heads/main@{#1303643}