Implement WindowOrWorkerGlobalScope::reportError (#40654)

This web API is alternative API to `throw e`, which is why we can reuse
a lot of the existing machinery.

The one testcase that isn't passing yet is because it reports an empty
`TypeError`. The current logic in `ErrorInfo` only retrieves the message
data, but doesn't include the type of the exception. For that, we need
to use `(*report)._base.errorNumber` and map that back to the original
type codes. However, deferring that to a follow-up as that requires some
more work in mozjs.

Signed-off-by: Tim van der Lippe <tvanderlippe@gmail.com>

components/script/dom/window.rs

@@ -1329,6 +1329,12 @@ impl WindowMethods<crate::DomTypeHolder> for Window {
         Some(DomRoot::from_ref(container))
     }
 
+    /// <https://html.spec.whatwg.org/multipage/#dom-reporterror>
+    fn ReportError(&self, cx: JSContext, error: HandleValue, can_gc: CanGc) {
+        self.as_global_scope()
+            .report_an_exception(cx, error, can_gc);
+    }
+
     /// <https://html.spec.whatwg.org/multipage/#dom-navigator>
     fn Navigator(&self) -> DomRoot<Navigator> {
         self.navigator