Performance Monitoring for Web Streams (`Response` API)

This was originally raised in [https://github.com/getsentry/sentry-javascript/issues/9626]()

We currently don't track the performance of web streams well. What does count as web streams? Basically everything that returns data in chunks (probably even normal http responses too):

* Websockets
* Server Sent Events
* Video streams
* etc.

In node we do this reasonably well because we hook into `res.end()` which generally marks the end of a Stream, however, we need to improve the WinterCG case with [`Response`](). The reader [seems to have]() a `done` property on stream chunks that we could use to mark the end of the stream.