libyuv: universal binary build for macOS (#29170)

* Create universal binary for libyuv

* Add comment about universal binaries to build script

* Remove duplicate license
old-commit-hash: f911e5f02869475acfb634a058771390fb2273c7

SConstruct

@@ -117,9 +117,8 @@ else:
 
   # MacOS
   if arch == "Darwin":
-    yuv_dir = "mac" if real_arch != "arm64" else "mac_arm64"
     libpath = [
-      f"#third_party/libyuv/{yuv_dir}/lib",
+      f"#third_party/libyuv/{arch}/lib",
       f"#third_party/acados/{arch}/lib",
       f"{brew_prefix}/lib",
       f"{brew_prefix}/opt/openssl@3.0/lib",