Add integration tests for and/or queries

Created by: rvantonder

I've been manually testing inputs that should go in integration tests. We are transitioning away from e2e web tests, so I can't put these tests there. We need some testing infrastructure for this RFC 142 but I'd like to happen in some way or form possibly sooner than that. It may come down to a simple Go binary that runs the queries against a sourcegraph URL until the more mature testing infra exists.