[9.0] Prevent work starvation bug if using scaling EsThreadPoolExecutor with core pool size = 0 (#124732)#124965

elasticsearchmachine merged 1 commit intoelastic:9.0elastic/elasticsearch:9.0from

mosche:backport/9.0/pr-124732mosche/elasticsearch:backport/9.0/pr-124732Copy head branch name to clipboard