script: Pass &mut JSContext to VirtualMethods::cloning_steps and Node::clone (#43130)

Continuation of #43108, two new `temp_cx()` calls were required:
- inside `maybe_clone_an_option_into_selectedcontent` since it's part of
a markup5ever trait
- inside `serialize_and_cache_subtree` replacing a `CanGc::note()` call,
propagating it inside reflow code will require even more effort.

Testing: No behaviour change, a successful build is enough.
Part of #40600

---------

Signed-off-by: Gae24 <96017547+Gae24@users.noreply.github.com>

components/script/dom/html/htmlscriptelement.rs

@@ -1205,13 +1205,13 @@ impl VirtualMethods for HTMLScriptElement {
 
     fn cloning_steps(
         &self,
+        cx: &mut JSContext,
         copy: &Node,
         maybe_doc: Option<&Document>,
         clone_children: CloneChildrenFlag,
-        can_gc: CanGc,
     ) {
         if let Some(s) = self.super_type() {
-            s.cloning_steps(copy, maybe_doc, clone_children, can_gc);
+            s.cloning_steps(cx, copy, maybe_doc, clone_children);
         }
 
         // https://html.spec.whatwg.org/multipage/#already-started