[@container] Move scroll-state() query tests to wpt
The spec PR landed, so tests should now be supported by the spec.
The 'inset-' prefix for the stuck keywords per were not per spec and
remove both from tests and implementation.
The tests for the 'none'-keyword for snapped and stuck does not match
the current spec draft, but will be fixed by [1]
Bug: 40279568, 40268059
Change-Id: I7cf8d3a2f251eaea0c3a78329c46a7bfddd85dda
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5850484
Reviewed-by: Anders Hartvoll Ruud andruud@chromium.org
Commit-Queue: Rune Lillesveen futhark@chromium.org
Cr-Commit-Position: refs/heads/main@{#1354415}