Following NXBT-3754 it appears that there is a performance regression when closing kafka consumer since 3.5.1.
This has been reported in https://issues.apache.org/jira/browse/KAFKA-15402.
This regression costs 1h30 in the 2023 CI chain (~5h vs 3h20 for pg&mongo UT)
This regression is not impacting prod or benchmark perf, just unit tests that start/stop thousands of consumers.
This is a temporary downgrade only for UT, this should be removed once KAFKA-15402 is fixed.