hal/vulkan: Fix multi draw indirect emulating and respect maxDrawIndirectCount

[beicause]

Description
Noted this when I was checking #8162

The offset argument of draw_indexed_indirect in hal/vulkan seems incorrect. It should + i * stride.
Also multi draw indirect should respect limits.maxDrawIndirectCount.

Actually, vkCmdDrawIndirectCount vkCmdDrawIndexedIndirectCount vkCmdDrawMeshTasksIndirectCountEXT also require that the count in the countBuffer must be <= maxDrawIndirectCount, altough on many devices it's u32::MAX(vulkan gpuinfo)

Testing
I assume the code is correct, I don't have a device to test this.

Squash or Rebase?
Squash

Checklist

• Run cargo fmt.
• Run taplo format.
• Run cargo clippy --tests. If applicable, add:
  • --target wasm32-unknown-unknown
• Run cargo xtask test to run tests.
• If this contains user-facing changes, add a CHANGELOG.md entry.

[ErichDonGubler]

I'm not @cwfitzgerald (the current assignee), but: We definitely need test coverage for this. This is fundamental enough to these specific APIs that I'd be shocked if there wasn't a CTS test path we could simply drop into cts_runner/test.lst it's necessary.

EDIT: This isn't covered by CTS, because it ain't WebGPU. 😅

[cwfitzgerald]

if there wasn't a CTS test path

MDI currently isn't in the spec, though there are plans to add it at some point.

We definitely need test coverage for this

+1

[ErichDonGubler]

Welp, I'm shocked, and it's my fault. 🤦🏻‍♂️😆