KIP-543 — Expand ConfigCommand's non-ZK functionality

Accepted Kafka 2.5 AdminKRaft

Expands ConfigCommand (kafka-configs.sh) to support all broker config operations via KafkaAdminClient rather than direct ZooKeeper access, achieving ZK-parity without ZK dependency. This is required for KRaft mode (KIP-500) where ZooKeeper is eliminated and all administrative operations must route through the broker.

Details