fix: suppress false dead code warning for make_request method

The make_request method is actually used by many tests across different modules,
but the Rust compiler incorrectly flags it as unused. Added #[allow(dead_code)]
to suppress this false warning.

Author: reyhankoyun

integration-tests/tests/common.rs

@@ -152,6 +152,7 @@ validate_credentials = true
         }
     }
 
+    #[allow(dead_code)]
     pub async fn make_request(&self, query: &AgentQuery) -> String {
         let response = self.make_request_raw(query).await;
         let status = response.status();