`scopeQuery` does not filter down repository results

Created by: christinaforney

Reported by https://app.hubspot.com/contacts/2762526/contact/17877751 that the scopeQuery for a8n campaigns was not matching the number of search results when using repohasfile filter.

Slack thread notes:

Ohh, boy. I think I've got it: I need to call .Results() again on the results here: https://github.com/sourcegraph/sourcegraph/blob/11b5ebbe3458c01d9d35a766fbfa4b07b3472be6/cmd/frontend/graphqlbackend/search.go#L756-L760