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/tests/wasm/headers.js

@@ -0,0 +1,3 @@
+export function new_headers() {
+  return new Headers({'Content-Type': 'text/plain'});
+}