KIP-56 — Allow cross origin HTTP requests on all HTTP methods

Accepted Connect

KIP-56 adds an `access.control.allow.methods` worker config to the Kafka Connect REST server so that CORS preflight responses include the operator-specified HTTP methods beyond the defaults (GET, POST, HEAD). Without it, browser-based tooling and dashboards cannot issue PUT, DELETE, or PATCH requests to the Connect REST API from a different origin.

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