Implement clip-distances extension for GL and Vulkan backends

[dzamkov]

Connections
#6236: Partially resolves

Description
Implements the clip-distances extension for GL and Vulkan backend. This was already implemented in Naga for the most part, so we just need to hook it up in the adapters. The GL backend is a bit tricky because we need to manually enable each clip plane we're using with the GL API.

Testing

• Added Naga snapshot tests
• Added GPU test
• Integrated into personal project and verified clip planes work as expected

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.