Fixed some clippy warning by adding default implementations (#31989)

* Fixed some clippy warning by adding default implementations

* Updated PR that adds default implementation of structs

* Clean up and extend `Default` implementations

---------

Co-authored-by: Martin Robinson <mrobinson@igalia.com>

components/script/dom/serviceworkerglobalscope.rs

@@ -242,7 +242,7 @@ impl ServiceWorkerGlobalScope {
                 runtime,
                 from_devtools_receiver,
                 closing,
-                Arc::new(Mutex::new(Identities::new())),
+                Arc::new(Mutex::new(Identities::default())),
             ),
             task_queue: TaskQueue::new(receiver, own_sender.clone()),
             own_sender,