Package landing page only shows `pure` runs results

The per-package overview page (https://ci.debian.net/packages/<package-first-letter//) currently only shows results from pure runs in each suite. This confuses people, as it doesn't show the last result. Showing only the last result is what we used to have, but we decided we didn't want that as default either. So, I think we need to do both somehow. Options are:

• Show both on the same page; the result page shows pure runs differently from non-pure runs, this page could do the same
• Have two pages, which clearly link to each other; in this case I'd want the pure page still being the landing page.
• Some form of hybrid, where what the user sees depends on some selection, but server side it's one page