Limit transforms to 2d scale, 2d translate and right-angled rotation

When calculating occlusion in the content space of a quad, limit the
quad's transform to 2d-scale, 2d-translate and right-angled rotations.

In occlusion culling algorithm, multiple methods like
`MapEnclosedRectWith2dAxisAlignedTransform()` are assuming 2d inputs,
hence limiting the quad transform to 2d transformations. This improves
performance of transform related operations.

This CL also simplify code for
`IsRightAngledRotationOrPositiveScaleOrTranslation()` and renames the
function to `Is2dAndRightAngledRotationOrPositiveScaleOrTranslation()`

Bug: b:390455017
Change-Id: I3a2043a8b073c4ffdeab4f3e583734d915cd1d0a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6256362
Reviewed-by: Peter McNeeley <petermcneeley@google.com>
Commit-Queue: Zoraiz Naeem <zoraiznaeem@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1419568}