feat: add Australia/Sydney timezone to base cronjobs

[another-rex]

Add timeZone: "Australia/Sydney" to all CronJob configurations under deployment/clouddeploy/gke-indexer/base/ and deployment/clouddeploy/gke-workers/base/ directories. This configures the cron schedules to evaluate against Sydney time instead of UTC.

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PR created automatically by Jules for task 12924298385411470107 started by @another-rex

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