[DO NOT MERGE] Debug PR 49440

[MortalHappiness]

Why are these changes needed?

In this experiment, I performed the following steps:

1. git reset back to 2.37.0, then let Buildkite build a Python 3.10 wheel. Afterward, I followed Setup Commands not running with Ray Cluster on GCP #46451 (comment) steps, but in the YAML file's setup_commands, I installed this wheel. After execution, errors were observed (some results were False, and some were True).
   1. Wheel link: https://buildkite.com/ray-project/premerge/builds/32438#01940146-c2cd-4271-bf60-b7da5bbc2f3c
   2. 
2. Applied Attempt to fix GCP autoscaler threading issue #49440 changes, then let Buildkite build another Python 3.10 wheel. Following the same steps in the above comment, I observed that no errors occurred (all results were True).
   1. Wheel link: https://buildkite.com/ray-project/premerge/builds/32440#019401c3-1cc7-47b7-a183-e144e9a7dbb7
   2. 

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Checks

• I've signed off every commit(by using the -s flag, i.e., git commit -s) in this PR.
• I've run scripts/format.sh to lint the changes in this PR.
• I've included any doc changes needed for https://docs.ray.io/en/master/.
  • I've added any new APIs to the API Reference. For example, if I added a
    method in Tune, I've added it in doc/source/tune/api/ under the
    corresponding .rst file.
• I've made sure the tests are passing. Note that there might be a few flaky tests, see the recent failures at https://flakey-tests.ray.io/
• Testing Strategy
  • Unit tests
  • Release tests
  • This PR is not tested :(