CI test linux://python/ray/data:test_stats is consistently_failing

[can-anyscale]

CI test linux://python/ray/data:test_stats is consistently_failing. Recent failures:
- https://buildkite.com/ray-project/postmerge/builds/13500#0199c122-b39e-4374-aee5-27be6ff971a0
- https://buildkite.com/ray-project/postmerge/builds/13500#0199c122-b39b-4ece-8816-cf5ddb03067a
- https://buildkite.com/ray-project/postmerge/builds/13500#0199c122-b3a4-4e21-ba88-70fb6d63c16c

DataCaseName-linux://python/ray/data:test_stats-END
Managed by OSS Test Policy

[can-anyscale]

This test is now considered as flaky because it has been failing on postmerge for too long. Flaky tests do not run on premerge.

[can-anyscale]

CI test linux://python/ray/data:test_stats is flaky. Recent failures:
- https://buildkite.com/ray-project/postmerge/builds/13596#0199ca94-fdf8-43f1-8dbb-ef723bbe416e
- https://buildkite.com/ray-project/postmerge/builds/13584#0199c7ba-d3c5-4442-a15c-86c28ec94e15
- https://buildkite.com/ray-project/postmerge/builds/13572#0199c64b-e42c-45b0-a4d9-cd14528059a3

DataCaseName-linux://python/ray/data:test_stats-END
Managed by OSS Test Policy

[can-anyscale]

Test passed on latest run: https://buildkite.com/ray-project/postmerge/builds/13606#0199cb76-bd28-40bf-a952-802742f230c5