KIP-1056 — Remove `default.` prefix for exception handler StreamsConfig

Accepted Kafka 4.0 Streams

Deprecates default.deserialization.exception.handler and default.production.exception.handler StreamsConfig keys and adds replacement names without the default. prefix (deserialization.exception.handler, production.exception.handler). The default. prefix implies that per-topic overrides are possible, but these handlers have no per-topic override mechanism, making the prefix semantically incorrect.

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