KIP-1004 — Enforce tasks.max property in Kafka Connect

Accepted Kafka 3.8 Connect

Enforces the `tasks.max` connector configuration so that a connector can never run more tasks than the configured upper bound, even if its `taskConfigs()` method returns more entries than allowed. Kafka Connect previously passed all generated task configs to the connector regardless of `tasks.max`, allowing connectors to silently exceed their resource quota.

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