Fix an issue with WorkerSketchFetcher not terminating on shutdown (#1…#13464

cryptoe merged 1 commit intoapache:25.0.0apache/druid:25.0.0from

adarshsanjeev:backport-sketch-fetcher-threadpool-fixadarshsanjeev/druid:backport-sketch-fetcher-threadpool-fixCopy head branch name to clipboard