Fix mypy error in test_reawaitable_concurrency.py

Add type ignore comment to suppress no-any-return error for await_helper function

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: proboscis

tests/test_primitives/test_reawaitable/test_reawaitable_concurrency.py

@@ -14,7 +14,7 @@ async def sample_coro() -> str:
 
 async def await_helper(awaitable_obj) -> str:
     """Helper to await objects in tasks."""
-    return await awaitable_obj
+    return await awaitable_obj  # type: ignore[no-any-return]
 
 
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