OPT-4926 the new elasticsearch version migrated to in the context of https://ci.optimize.camunda.cloud/view/all/job/upgrade-performance-large-static-dataset/ is 7.5.0. However we encountered failures of this test due to unexpected snapshot "disappearence", see https://ci.optimize.camunda.cloud/view/all/job/upgrade-performance-large-static-dataset/952/console
The underlying issue is on the side of elastic https://github.com/elastic/elasticsearch/issues/50200 and got fixed with 7.5.1 by https://github.com/elastic/elasticsearch/pull/50202.
We thus should use 7.5.1 at least during the migration test.
- Elasticsearch 7.5.1 is used for the at least the data migration tests
The added complexity to use 7.5.1 only for migration testing might not be worth it, thus we raising minimum version to 7.5.1 overall might be the better compromise.