KIP-733 — change Kafka Streams default replication factor config

Accepted Kafka 3.0 Streams

Changes the default value of `replication.factor` in Kafka Streams from `1` to `-1` (use broker default) to align with the broker-side default replication factor. The hardcoded default of `1` is unsafe for production—users must remember to override it—while `-1` (available since Kafka 2.4, KIP-464) delegates to the broker's `default.replication.factor`.

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