Change streams can be opened on a collection, a database, or a whole cluster.

We test that whole-db (whole_db.js) and whole-cluster (whole_cluster.js) change streams work with change collections, since we run them as part of the  change_streams_multitenant_passthrough.yml. (In serverless, a whole-cluster change stream would return all data for the tenant, even if the tenant is sharing a replica set with other tenants.)

We should also test that whole-collection change streams work with change collections.