[Backend Tester] Add TorchAudio tests

ghstack-source-id: 4b41f3a
ghstack-comment-id: 3095005640
Pull-Request: #12666

Author: GregoryComer

backends/test/suite/runner.py

@@ -51,6 +51,8 @@ def build_result(
             result=result,
             error=error,
         )
+    
+    model.eval()
 
     model.eval()