Function signature change: reading all bytes from a stream

The signature of [reading all bytes](https://streams.spec.whatwg.org/#readablestreamdefaultreader-read-all-bytes) had changed:
https://github.com/whatwg/streams/pull/1250

It now accepts `successSteps` and `failureSteps` instead of returning a `Promise`, in an attempt to decouple streams from JS when appropriate.

Opening this issue since this spec uses that function