Support STORAGE_RESOURCE_BINDING_ARRAY on Metal

[msvbg]

Connections

Depends on gfx-rs/metal-rs#366.

Description
This PR supports using binding arrays of storage textures/buffers on Metal.

Testing
I have tested this change locally on my M3 MacBook with Metal 3, and my shaders are able to bind and use the binding arrays as expected.

Squash or Rebase?

Fine to 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.