insights: behaviour for search queries with multiple capturing groups
Created by: leonore
from https://github.com/sourcegraph/sourcegraph/pull/40714#discussion_r954887008
we need to confirm
- how an aggregation over multiple capture groups will behave (expected behaviour is it will behave like capture group insights and just append the values to the result)
- and whether this is a change worth making for the scope
/cc @joelkw @felixfbecker @vovakulikov @unclejustin