Switch hassio to use iter_chunks

[bdraco]

Proposed change

This was ~7% faster downloading backups because it did not
have to re-package the data as much

https://docs.aiohttp.org/en/stable/streams.html#aiohttp.StreamReader.iter_chunks

This makes sense for a proxy like operation.

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[home-assistant]

Hey there @home-assistant/supervisor, mind taking a look at this pull request as it has been labeled with an integration (hassio) you are listed as a code owner for? Thanks!

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[frenck]

Thanks, @bdraco 👍

../Frenck

[allenporter]

👍🏼 Looks great.

Reading through the streams code I can see what you're saying: iter chunked just pops http chunks directly, rather than trying to partial read / split the chunks. Just adding commentary to give visibility into the review.

Edit: Too slow :)

[bdraco]

Thanks everyone