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/module_loading.rs

@@ -383,7 +383,7 @@ fn continue_dynamic_import(
                 &global_scope,
                 Some(on_fulfilled),
                 Some(Box::new(OnRejectedHandler {
-                    promise: inner_promise.clone(),
+                    promise: inner_promise,
                 })),
                 CanGc::note(),
             );