Add metallib passthrough

[inner-daemons]

Connections
Closes #8828

Description
Adds metallib passthrough, the compiled library form of metal shaders. This further reduces startup time.

This also tweaks existing passthrough to not require an entry point at shader module creation time

Testing
New passthrough 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.