Script: Change the rest of script to not rely on Deref<str> for DOMString (#39481)

This is part of the future work of implementing LazyDOMString as
outlined in issue #39479.

We use str() method or direct implementations on DOMString for these
methods. We also change some types.
This is independent of https://github.com/servo/servo/pull/39480

Signed-off-by: Narfinger Narfinger@users.noreply.github.com

Testing: This is essentially just renaming a method and a type and
should not change functionality.

Signed-off-by: Narfinger <Narfinger@users.noreply.github.com>

components/script_bindings/proxyhandler.rs

@@ -517,7 +517,10 @@ pub(crate) fn report_cross_origin_denial<D: DomTypes>(
     debug!(
         "permission denied to {} property {} on cross-origin object",
         access,
-        id_to_source(cx, id).as_deref().unwrap_or("< error >"),
+        id_to_source(cx, id)
+            .as_ref()
+            .map(|source| source.str())
+            .unwrap_or("< error >"),
     );
     let in_realm_proof = AlreadyInRealm::assert_for_cx(cx);
     unsafe {