KafkaSinkCluster add Node::state field - control connection approach

[rukai]

A possible approach

If we dont end up using this approach extract some of the minor cleanups.

[codspeed-hq[bot]]

CodSpeed Performance Report

Merging #1702 will not alter performance

_{Comparing rukai:add_state_control_connection (79f9c8e) with main (4c146b8)}

Summary

✅ 39 untouched benchmarks