Add decorator for suppress optional internal methods in Amazon Provider

[Taragolis]

Initially I've plan only refactor _generate_dag_key by use internal generate_uuid and found that if some error occurs in the future in generate_uuid then it might affects some users.

As final result I decorate all non-main-functional methods by return_on_error, so we don't need to put all function code inside of try.. except Exception.

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[potiuk]

makes perfect sense.