fix(dx12): Fix textureNum{Levels,Layers,Samples} functions

[andyleiserson]

Fixes https://bugzilla.mozilla.org/show_bug.cgi?id=2012288.

Updates image queries in HLSL to use correct GetDimension overloads and result swizzles. (Note that not all GetDimensions overloads in the table need to be handled, some of them are for texture types that WebGPU doesn't offer.)

I've also added textureDimensions to the test lists, but this doesn't change anything about textureDimensions behavior, I just looked at the textureDimensions failures in case they needed a similar fix.

Testing
Enables CTS tests. Also tested manually that it resolves the linked Firefox bug.

Squash or Rebase? Squash

Checklist

• I self-reviewed and fully understand this PR.
• WebGPU implementations built with wgpu may be affected behaviorally.
• Validation and feature gates are in place to confine behavioral changes.
• Tests demonstrate the validation and altered logic works.
• CHANGELOG.md entries for the user-facing effects of this change are present.
• The PR is minimal, and doesn't make sense to land as multiple PRs.
• Commits are logically scoped and individually reviewable.
• The PR description has enough context to understand the motivation and solution implemented.

[teoxoy]

I was wondering why + extra_coords and it seems to be for NumberOfLevels of sampled textures. Looks good.