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/dom/trustedscripturl.rs

@@ -70,7 +70,7 @@ impl TrustedScriptURL {
 impl fmt::Display for TrustedScriptURL {
     #[inline]
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str(&self.data)
+        f.write_str(self.data.str())
     }
 }