[whatwg/streams] strategySizeAlgorithm validation in WritableStreamDefaultControllerGetChunkSize (Issue #1341)

daeyeon created an issue (whatwg/streams#1341)

### What is the issue with the Streams Standard?

Hi, while reviewing an [issue](https://github.com/nodejs/node/issues/57272) in Node.js, I noticed a case where the stream's state is `'closed'` when getting the chunk size, after the `sizeAlgorithm` has been cleared.

i. writableStreamDefaultWriterClose
ii. writableStreamClose
iii. writableStreamDefaultControllerClose
iv. writableStreamDefaultControllerAdvanceQueueIfNeeded
v. [WritableStreamDefaultControllerProcessClose(controller)](https://streams.spec.whatwg.org/#writable-stream-default-controller-process-close)

> 6. Perform ! WritableStreamDefaultControllerClearAlgorithms(controller).
>> 4. Set controller.[[strategySizeAlgorithm]] to undefined.

> 7.1. Perform ! WritableStreamFinishInFlightClose(stream).
>> 7. Set stream.[[state]] to "closed".

However, the current assertion below only checks `erroring` or `errored` states.

> WritableStreamDefaultControllerGetChunkSize(controller, chunk) performs the following steps:
> 1. If controller.[[strategySizeAlgorithm]] is undefined, then:
> 1.1. Assert: controller.[[stream]].[[state]] is "erroring" or "errored".
> 1.2. Return 1.


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