tests: disable leadership balancer in cg recovery test

The consumer group recovery test doesn't do any validation if offset
listing was successful. Disabling leader balancer will make the test
more stable before we introduce validation in recovery tool (now the
tool assumes that user is going to review offsets listing).

Signed-off-by: Michal Maslanka <michal@redpanda.com>

tests/rptest/tests/consumer_group_recovery_tool_test.py

@@ -38,7 +38,8 @@ def __init__(self, test_ctx, *args, **kwargs):
                 # clear topics from the the kafka_nodelete_topics to allow for
                 # __consumer_offsets to be configured in this test.
                 "kafka_nodelete_topics": [],
-                "group_topic_partitions": self.initial_partition_count
+                "group_topic_partitions": self.initial_partition_count,
+                "enable_leader_balancer": False,
             },
             node_prealloc_count=1,
             **kwargs)