fix(rust_bridge): use Python::attach for amessages after pyo3 bump

Co-Authored-By: Ishaan Jaffer <155045088+ishaan-berri@users.noreply.github.com>

litellm-rust/crates/python-bridge/src/lib.rs

@@ -254,7 +254,7 @@ fn amessages(
         .await
         .map_err(core_error_to_pyerr)?;
 
-        Python::with_gil(|py| json_to_py(py, value))
+        Python::attach(|py| json_to_py(py, value))
     })
 }