Logstash consumer threads should match topic partition count

- Default is set to 3. If there are too many consumer threads it may lead to idle logstash worker threads and could require decreasing this value to saturate workers

Signed-off-by: reyesj2 <94730068+reyesj2@users.noreply.github.com>

salt/logstash/pipelines/config/so/0800_input_kafka.conf.jinja

@@ -13,6 +13,7 @@ input {
         codec => json
         topics => ['default-topic', 'kratos-topic', 'soc-topic', 'strelka-topic', 'suricata-topic', 'zeek-topic', 'rita-topic', 'opencanary-topic', 'syslog-topic']
         group_id => 'searchnodes'
+        consumer_threads => 3
         client_id => '{{ GLOBALS.hostname }}'
         security_protocol => 'SSL'
         bootstrap_servers => '{{ bootstrap_servers }}'