[9.0] TEST Fix ThreadPoolMergeSchedulerStressTestIT testMergingFallsBehindAndThenCatchesUp (#131636)#131676

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

albertzaharovits:backport/9.0/pr-131636albertzaharovits/elasticsearch:backport/9.0/pr-131636Copy head branch name to clipboard