[MX-158] Artwork page: separating queries for above-the-fold and below-the-fold content

[ds300]

https://artsyproduct.atlassian.net/browse/MX-158

As mentioned in the ticket, it seems that queries for only the above-the-fold content (images, commercial information, and metadata like slug etc) take about half as long as queries for the full content (most of that extra time is probably down to the context artwork grids).

This definitely feels snappier to me, and we're collecting the stats on datadog so we should have actual data soon! 📊

[ds300]

Thanks for the great feedback @ashfurrow 🙏

mergeOnGreen

[artsyit]

:rocket: PR was released in v1.21.45 :rocket: