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/gpui/src/scene.rs

@@ -662,7 +662,7 @@ pub(crate) struct PaintSurface {
     pub bounds: Bounds<ScaledPixels>,
     pub content_mask: ContentMask<ScaledPixels>,
     #[cfg(target_os = "macos")]
-    pub image_buffer: media::core_video::CVImageBuffer,
+    pub image_buffer: core_video::pixel_buffer::CVPixelBuffer,
 }
 
 impl From<PaintSurface> for Primitive {