fix: fix clone_on_copy lint in actor tests

Author: unbalancedparentheses

Cargo.lock

@@ -237,10 +237,11 @@ pub fn backend_default_is_async() {
 }
 
 #[test]
+#[allow(clippy::clone_on_copy)]
 pub fn backend_enum_is_copy_and_clone() {
     let backend = Backend::Async;
     let copied = backend; // Copy
-    let cloned = backend.clone(); // Clone
+    let cloned = backend.clone(); // Clone - intentionally testing Clone trait
     assert_eq!(backend, copied);
     assert_eq!(backend, cloned);
 }