Cleaned up wpt tests for attr()
If resolved attr()'s value is invalid against property value that it
is applied to, it should be IACVT and not fallback to the previous
property definition.
Removed outdated wpt tests accordingly.
Bug: 369858674, 40320391
Change-Id: Ieb2f15b2f354e223c9cbd62b71e0aefad45f8cc8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5977581
Reviewed-by: Anders Hartvoll Ruud andruud@chromium.org
Commit-Queue: Munira Tursunova moonira@google.com
Cr-Commit-Position: refs/heads/main@{#1376611}