Everywhere: Remove instances of clippy::redundant-clone (#43212)

This change fixes all instances where
[`clippy::redundant-clone`](https://rust-lang.github.io/rust-clippy/master/index.html?groups=complexity%2Ccorrectness%2Cnursery%2Csuspicious&levels=allow#redundant_clone)
would trigger. It's allowed by default

I've also changed the lint to warn-by-default for servo.

Testing: Covered by WPT

---------

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

components/script/dom/html/htmlmediaelement.rs

@@ -1459,7 +1459,7 @@ impl HTMLMediaElement {
             global.core_resource_thread(),
         ));
         let listener =
-            HTMLMediaElementFetchListener::new(self, request.id, url.clone(), offset.unwrap_or(0));
+            HTMLMediaElementFetchListener::new(self, request.id, url, offset.unwrap_or(0));
 
         self.owner_document().fetch_background(request, listener);
 
@@ -3646,7 +3646,7 @@ impl HTMLMediaElementFetchContext {
             is_seekable: false,
             origin_clean: true,
             data_source: RefCell::new(BufferedDataSource::new()),
-            fetch_canceller: FetchCanceller::new(request_id, false, core_resource_thread.clone()),
+            fetch_canceller: FetchCanceller::new(request_id, false, core_resource_thread),
         }
     }