lib: set Symbol.toStringTag of DOMException

PR-URL: #22933
Refs: #22550
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: John-David Dalton <john.david.dalton@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

lib/internal/domexception.js

@@ -43,6 +43,10 @@ class DOMException extends Error {
   }
 }
 
+Object.defineProperties(DOMException.prototype, {
+  [Symbol.toStringTag]: { configurable: true, value: 'DOMException' }
+});
+
 for (const [name, codeName, value] of [
   ['IndexSizeError', 'INDEX_SIZE_ERR', 1],
   ['DOMStringSizeError', 'DOMSTRING_SIZE_ERR', 2],