stream: unref

Current WIP unref implementation that was talked about in:

• #46980 (closed)

Cc @benjamingr, @ronag WDYT?

---

This would allow the following code:

const csvParsedStream = fs
	.createReadStream('file.csv')
	.compose(csvParse({ columns: false }));

const [columns] = await unref(csvParsedStream)
	.take(1)
	.toArray();

const parsed = await csvParsedStream.map((row) => parseRowByColumns(row, columns)).toArray();