CI test darwin://python/ray/tests:test_multi_node_2 is flaky

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CI test darwin://python/ray/tests:test_multi_node_2 is flaky. Recent failures:

• https://buildkite.com/ray-project/postmerge-macos/builds/252#018e770c-5e4f-4f0c-8d1d-d198aa4c6b3f
• https://buildkite.com/ray-project/postmerge-macos/builds/238#018e683b-1179-43b8-9350-2e84641380e9
• https://buildkite.com/ray-project/postmerge-macos/builds/233#018e673f-8df5-4180-bdcb-4dbe4ec8e7f0
• https://buildkite.com/ray-project/postmerge-macos/builds/219#018e6220-c2b0-49a3-b082-8d874b02d321
• https://buildkite.com/ray-project/postmerge-macos/builds/218#018e61b6-35ce-410b-b2ad-40818f2508d0

DataCaseName-darwin://python/ray/tests:test_multi_node_2-END Managed by OSS Test Policy

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Test passed on latest run: https://buildkite.com/ray-project/postmerge-macos/builds/314#018e8bde-9080-4bd9-a64e-a1994df2f215