Switch fully to Rust Livekit (redux) (#27126)

Swift bindings BEGONE

Release Notes:

- Switched from using the Swift LiveKit bindings, to the Rust bindings,
fixing https://github.com/zed-industries/zed/issues/9396, a crash when
leaving a collaboration session, and making Zed easier to build.

---------

Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>
Co-authored-by: Michael Sloan <michael@zed.dev>

.github/workflows/ci.yml

@@ -209,7 +209,6 @@ jobs:
           cargo check -p workspace
           cargo build -p remote_server
           cargo check -p gpui --examples
-          script/check-rust-livekit-macos
 
       # Since the macOS runners are stateful, so we need to remove the config file to prevent potential bug.
       - name: Clean CI config file