Split up ChangesetCountsOverTime tests into integration and unit
Created by: mrnugget
This fixes #12835 by removing the heavy mocks and database logic from the unit test and extending the ingration test to go through the GraphQL layer too.
Created by: mrnugget
This fixes #12835 by removing the heavy mocks and database logic from the unit test and extending the ingration test to go through the GraphQL layer too.