feat: increase Kafka replication factor to enhance data reliability

Author: ugo

charts/sentry/values.yaml

@@ -2207,9 +2207,7 @@ kafka:
   provisioning:
     ## Increasing the replicationFactor enhances data reliability during Kafka pod failures by replicating data across multiple brokers.
     # Note that existing topics will remain with replicationFactor: 1 when updated.
-    replicationFactor: 1
-    parallel: 2
-    enabled: false
+    replicationFactor: 3
     # Topic list is based on files below.
     # - https://github.com/getsentry/snuba/blob/master/snuba/utils/streams/topics.py
     # - https://github.com/getsentry/sentry/blob/master/src/sentry/conf/types/kafka_definition.py