There are two interesting cases to test, as explained in SERVER-136545:

1. If a collection is created and dropped within the same checkpoint, it is absent from the primary's checkpoint, and the standby should not expect to see an entry for that collection.
2. If a collection is created and dropped across checkpoints, the collection is present in the primary's checkpoint as a container delete, and the standby should expect to see that collection in the checkpoint.

Extend checkpoint_validation_steady_state.js or add a new JS test to test collection drops within and across checkpoints.