production/cassandra: Add more content replayers

The directory replay is done so now the priority is on the contents

Related to swh/infra/sysadm-environment#4739

swh/values/cassandra-replay.yaml

@@ -39,7 +39,7 @@ storage_replayer:
       requestedCpu: 425m
       requestedMemory: 200Mi
       autoScaling:
-        maxReplicaCount: 48
+        maxReplicaCount: 64
     directory:
       objects:
         - directory
@@ -50,7 +50,7 @@ storage_replayer:
       #Follow up consumption
       requestedMemory: 100Mi
       autoScaling:
-        maxReplicaCount: 16
+        maxReplicaCount: 5
       specific_options:
         directory_entries_insert_algo: batch
     extid: