tests: TestUpdateWorkloadOnDelete failed

Note: #731 was also for this test, but it was closed more than 10 days ago. So, I didn't mark it flaky. ---- commit: 9718f37bf41af42ba88bd70ada61f1036bcee26c buildURL: https://github.com/GoogleCloudPlatform/cloud-sql-proxy-operator/actions/runs/22977256679 status: failed