Deletions can easily impact paging (see
CASSANDRA-8490 for an example). We should improve the paging dtests to include various kinds of deletions: partition-level, row-level, and cell-level. The tests should also exercise deleting enough contiguous partitions/rows/levels to fill an entire page.
Assigning to Russ Hatch for now since he created the original paging tests, but I can reassign this if needed.