LibWeb: Make DOM::Event and all its subclasses GC-allocated

Author: https://github.com/awesomekling
Commit: 7c3db526b0
Pull-request: https://github.com/SerenityOS/serenity/pull/14816
Reviewed-by: https://github.com/ADKaster
Reviewed-by: https://github.com/linusg ✅

Userland/Libraries/LibWeb/HTML/CloseEvent.idl

@@ -1,5 +1,6 @@
 #import <DOM/Event.idl>
 
+[NoInstanceWrapper]
 interface CloseEvent : Event {
     constructor(DOMString type, optional CloseEventInit eventInitDict = {});