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/storybook/build.rs

@@ -1,11 +1,4 @@
 fn main() {
-    // Find WebRTC.framework as a sibling of the executable when running outside of an application bundle.
-    // TODO: We shouldn't depend on WebRTC in editor
-    #[cfg(target_os = "macos")]
-    {
-        println!("cargo:rustc-link-arg=-Wl,-rpath,@executable_path");
-    }
-
     #[cfg(target_os = "windows")]
     {
         #[cfg(target_env = "msvc")]