[Clippy] Swap waker_clone_wake to use diagnostic item instead of path

Author: GnomedDev

core/src/task/wake.rs

@@ -414,6 +414,7 @@ impl<'a> ContextBuilder<'a> {
 /// [`Wake`]: ../../alloc/task/trait.Wake.html
 #[repr(transparent)]
 #[stable(feature = "futures_api", since = "1.36.0")]
+#[cfg_attr(not(test), rustc_diagnostic_item = "Waker")]
 pub struct Waker {
     waker: RawWaker,
 }