Implement `patchAsyncStorage()`

Open next relies on [`patchAsyncStorage()`](https://github.com/opennextjs/opennextjs-aws/blob/8ab921f8b5bd40c7ba109ccef3e59a6c24283fb2/packages/open-next/src/core/patchAsyncStorage.ts#L5) to select the React bundle to load.

We should implement the same functionality for the cloudflare adapter where we can not patch `mod._resolveFilename`