tests: perf_fast_forward: Allow testing with cache enabled
tests: perf_fast_forward: Allow testing with cache enabled

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