KIP-154 — Add Kafka Connect configuration properties for creating internal topics

Accepted Kafka 1.0 Connect

Adds `offset.storage.*`, `config.storage.*`, and `status.storage.*` config prefixes to Kafka Connect `WorkerConfig`, allowing operators to set replication factor, cleanup policy, compaction settings, and other topic configs for the three internal Connect topics. Previously, internal topic creation used hardcoded defaults (replication.factor=1 for offsets, etc.), making production deployments with replication impossible without manual topic pre-creation.

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