Fix race condition in `SnapshotMetricsIT.testSnapshotAPMMetrics`#132686

JeremyDahlgren merged 2 commits intoelastic:mainelastic/elasticsearch:mainfrom

JeremyDahlgren:fix-SnapshotMetricsIT-testSnapshotAPMMetricsJeremyDahlgren/elasticsearch:fix-SnapshotMetricsIT-testSnapshotAPMMetricsCopy head branch name to clipboard