Migrate Google example DAG s3_to_gcs to new design AIP-47

[chenglongyan]

related: #22447, #22430

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[potiuk]

Rebased to fix selective check problem from #24665 after it's merged.

[o-nikolas]

Code changes look functionally fine, but there are some formatting issues that are causing static checks to fail.

You can check for these on your local dev machine easily by enabling pre commit/push checks (see the airflow docs here and here on how to do that)