Rename livekit_client_macos test_app to suppress warnings (#22719)

Peter Tripp created

Current copy/paste conflict between crates triggers warnings during test
runs.
 
<img width="1492" alt="Screenshot 2025-01-06 at 12 41 11"
src="https://github.com/user-attachments/assets/ea7f90ec-bef8-482a-a954-6d5c41b9fd7e"
/>

Release Notes:

- N/A

Change summary

crates/livekit_client_macos/Cargo.toml                 | 2 +-
crates/livekit_client_macos/examples/test_app_macos.rs | 0 
2 files changed, 1 insertion(+), 1 deletion(-)

Detailed changes