tests: mvcc: Add test for eviction with non-evictable snapshots
tests: mvcc: Add test for eviction with non-evictable snapshots

avikivity/scylla,duarten/scylla,duarten/scylla,duarten/scylla,scylladb/scylla,scylladb/scylla,avikivity/scylla,scylladb/scylla,scylladb/scylla,avikivity/scylla