RPM build fix (reverted CI changes which will need to be un-reverted or made conditional) and vendor Rust dependencies to make builds much faster in any CI system.

zeroidc/vendor/web-sys/webidls/enabled/CustomElementRegistry.webidl

@@ -0,0 +1,23 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// https://html.spec.whatwg.org/#dom-window-customelements
+[Func="CustomElementRegistry::IsCustomElementEnabled"]
+interface CustomElementRegistry {
+  [CEReactions, Throws]
+  undefined define(DOMString name, Function functionConstructor,
+              optional ElementDefinitionOptions options);
+  [ChromeOnly, Throws]
+  undefined setElementCreationCallback(DOMString name, CustomElementCreationCallback callback);
+  any get(DOMString name);
+  [Throws]
+  Promise<undefined> whenDefined(DOMString name);
+  [CEReactions] undefined upgrade(Node root);
+};
+
+dictionary ElementDefinitionOptions {
+  DOMString extends;
+};
+
+callback CustomElementCreationCallback = undefined (DOMString name);