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>

crates/zed/build.rs

@@ -4,15 +4,6 @@ fn main() {
     if cfg!(target_os = "macos") {
         println!("cargo:rustc-env=MACOSX_DEPLOYMENT_TARGET=10.15.7");
 
-        println!("cargo:rerun-if-env-changed=ZED_BUNDLE");
-        if std::env::var("ZED_BUNDLE").ok().as_deref() == Some("true") {
-            // Find WebRTC.framework in the Frameworks folder when running as part of an application bundle.
-            println!("cargo:rustc-link-arg=-Wl,-rpath,@executable_path/../Frameworks");
-        } else {
-            // Find WebRTC.framework as a sibling of the executable when running outside of an application bundle.
-            println!("cargo:rustc-link-arg=-Wl,-rpath,@executable_path");
-        }
-
         // Weakly link ReplayKit to ensure Zed can be used on macOS 10.15+.
         println!("cargo:rustc-link-arg=-Wl,-weak_framework,ReplayKit");