next.js

5abb663b - Don't create client-side debug channel if the feature is disabled (#83699)

Don't create client-side debug channel if the feature is disabled (#83699) Creating the client-side debug channel when `experimental.reactDebugChannel` is falsy went unnoticed in the [original PR](https://github.com/vercel/next.js/pull/82748), because this doesn't provoke any obvious errors. The debug info is still correctly received through the main RSC stream. But it does create a memory leak, because it prevents React from closing the Flight response. On the server side, we were already guarding the feature properly using the feature flag.