[CI] MlMappingsUpgradeIT testMappingsUpgrade can fail depending on order of other tests #37763
Description
org.elasticsearch.upgrades.MlMappingsUpgradeIT testMappingsUpgrade has failed in a few builds:
- https://elasticsearch-ci.elastic.co/job/elastic+elasticsearch+master+intake/1446/console
- https://elasticsearch-ci.elastic.co/job/elastic+elasticsearch+master+intake/1448/console
- https://elasticsearch-ci.elastic.co/job/elastic+elasticsearch+master+intake/1450/console
The problem is that another test deletes the index this test is asserting on - if they run in the wrong order then it fails.