CI test linux://python/ray/air:test_resource_manager_placement_group is flaky

[can-anyscale]

CI test linux://python/ray/air:test_resource_manager_placement_group is consistently_failing. Recent failures:
- https://buildkite.com/ray-project/postmerge/builds/9143#0195d440-66b5-4bbf-ad0a-60f99648b760
- https://buildkite.com/ray-project/postmerge/builds/9143#0195d410-6d96-4883-b91a-b5defaefaebd

DataCaseName-linux://python/ray/air:test_resource_manager_placement_group-END
Managed by OSS Test Policy

[can-anyscale]

Test passed on latest run: https://buildkite.com/ray-project/postmerge/builds/9155#0195d4eb-07c3-435f-830c-820ca839a5e8

[can-anyscale]

Test passed on latest run: https://buildkite.com/ray-project/postmerge/builds/9155#0195d4eb-07ba-4364-8c94-efb13e07e42c

[can-anyscale]

CI test linux://python/ray/air:test_resource_manager_placement_group is consistently_failing. Recent failures:
- https://buildkite.com/ray-project/postmerge/builds/9170#0195d967-6b42-49c5-b20b-0a0a5416f2f2
- https://buildkite.com/ray-project/postmerge/builds/9170#0195d93b-ba00-4c84-9c24-77ab317a69d4
- https://buildkite.com/ray-project/postmerge/builds/9143#0195d440-66b5-4bbf-ad0a-60f99648b760
- https://buildkite.com/ray-project/postmerge/builds/9143#0195d410-6d96-4883-b91a-b5defaefaebd

DataCaseName-linux://python/ray/air:test_resource_manager_placement_group-END
Managed by OSS Test Policy

[can-anyscale]

Test passed on latest run: https://buildkite.com/ray-project/postmerge/builds/9202#0195dee3-ef64-4726-b4ed-02b389c44514