insights: Investigate how to get more capture group aggregations to finish in time

Created by: CristinaBirkel

Now that we're adding in the capture group aggregations, it's clear that these might need more time to finish in general. Can we give these searches more than 2 seconds? Can we improve the performance some other way? Can we make do with less results?

/cc @joelkw @felixfbecker @vovakulikov @unclejustin