script_bindings: Assert that serializable/transferable types have accurate WebIDL annotations (#38615)

These changes add compile-time assertions that:
* any type that implements the Serializable/Transferable trait has a
`[Serializable]` or `[Transferable]` annotation in the interface WebIDL
* any WebIDL interface with the `[Serializable]` or `[Transferable]`
annotation implements the corresponding trait

This is useful because it means that WebIDL definitions will be less
confusing if you're trying to figure out whether Servo supports
serializing/transferring a particular interface type. It also makes
fixing #21715 in the future a little bit easier, because the annotations
will remain up to date.

Testing: compile-time only; no point in writing tests for this since it
involves webidl codegen.

---------

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

components/script_bindings/webidls/DOMException.webidl

@@ -9,7 +9,8 @@
 
 [
   ExceptionClass,
-  Exposed=(Window,Worker,Worklet,DissimilarOriginWindow)
+  Exposed=(Window,Worker,Worklet,DissimilarOriginWindow),
+  Serializable,
 ]
 interface DOMException {
   [Throws] constructor(optional DOMString message="", optional DOMString name="Error");