pgo: disable tablets for training with secondary index, lwt and counters

As of right now, materialized views (and consequently secondary
indexes), lwt and counters are unsupported or experimental with tablets.
Since by defaults tablets are enabled, training cases using those
features are currently broken.

The right thing to do here is to disable tablets in those cases.

Fixes scylladb#22638

Closes scylladb#22661

Author: michoecho

pgo/conf/counters.yaml

@@ -1,7 +1,7 @@
 DROP KEYSPACE IF EXISTS counters;
 
 CREATE KEYSPACE IF NOT EXISTS counters
-WITH replication = {'class': 'NetworkTopologyStrategy', 'dc1': '3'};
+WITH replication = {'class': 'NetworkTopologyStrategy', 'dc1': '3'} AND TABLETS = {'enabled': false};
 
 CREATE TABLE IF NOT EXISTS counters.counter1 (
                 key blob PRIMARY KEY,

pgo/conf/lwt.yaml

@@ -3,7 +3,7 @@ keyspace: ks
 
 # The CQL for creating a keyspace (optional if it already exists)
 keyspace_definition: |
-  CREATE KEYSPACE ks WITH replication = {'class': 'NetworkTopologyStrategy', 'replication_factor': 3};
+  CREATE KEYSPACE ks WITH replication = {'class': 'NetworkTopologyStrategy', 'replication_factor': 3} AND TABLETS = {'enabled': false};
 
 # Table name
 table: targettable

pgo/conf/si.yaml

@@ -2,7 +2,7 @@ keyspace: sec_index
 
 keyspace_definition: |
 
-  CREATE KEYSPACE IF NOT EXISTS sec_index WITH replication = {'class': 'NetworkTopologyStrategy', 'replication_factor': 3};
+  CREATE KEYSPACE IF NOT EXISTS sec_index WITH replication = {'class': 'NetworkTopologyStrategy', 'replication_factor': 3} AND TABLETS = {'enabled': false};
 
 table: users