tests: TestPostgresIAMDBAuthn failed

[flaky-bot]

This test failed!

To configure my behavior, see the Flaky Bot documentation.

If I'm commenting on this issue too often, add the flakybot: quiet label and
I will stop commenting.

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commit: b2fcfac
buildURL: https://github.com/GoogleCloudPlatform/cloud-sql-proxy/actions/runs/26380846094
status: failed

[flaky-bot]

Looks like this issue is flaky. 😟

I'm going to leave this open and stop commenting.

A human should fix and close this.

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When run at the same commit (b2fcfac), this test passed in one build (https://github.com/GoogleCloudPlatform/cloud-sql-proxy/actions/runs/26380846094) and failed in another build (https://github.com/GoogleCloudPlatform/cloud-sql-proxy/actions/runs/26380846094).