[9.1] TEST Fix ThreadPoolMergeSchedulerStressTestIT testMergingFallsBehindAndThenCatchesUp (#131636)#131674

elasticsearchmachine merged 1 commit intoelastic:9.1elastic/elasticsearch:9.1from

albertzaharovits:backport/9.1/pr-131636albertzaharovits/elasticsearch:backport/9.1/pr-131636Copy head branch name to clipboard