[BP-1.17][FLINK-34324][test] Makes all s3 related operations being declared and called in a single location

[XComp]

1.17 backport PR for parent PR https://github.com/apache/flink/pull/24244

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CI report:

• 163efd8584796be84153823bb5180b6213bbecbb Azure: SUCCESS

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[XComp]

Closing this one because there are still issues.