[deno] Fix some problems in the handling of device limits

[andyleiserson]

Fix two problems with the handling of device limits:

• Deno was raising a TypeError when a value was over the limit, but it should be an OperationError.
• Requesting a limit value below WebGPU's default should ignore the requested value and substitute the default value of such limits.

Testing
Enables some CTS tests.

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.