LibJS: Allow exporting any imported bindings

Author: https://github.com/davidot
Commit: faf1430ce4
Pull-request: https://github.com/SerenityOS/serenity/pull/15100
Reviewed-by: https://github.com/linusg

Userland/Libraries/LibJS/Tests/modules/re-export-namespace-via-binding.mjs

@@ -0,0 +1,7 @@
+import * as namespace from "./default-and-star-export.mjs";
+import { "*" as fromStar } from "./default-and-star-export.mjs";
+export { namespace };
+
+import { namespace as nm } from "./re-export-namespace-via-binding.mjs";
+
+export const passed = nm === namespace && fromStar === namespace["*"];