Enable using wif for storage transfer

[lalmgren]

closes: #35271

This adds the possibility to input aws_role_arn for CloudDataTransferServiceS3ToGCSOperator which can be used for authentication with workload identity federation between GCP and AWS.

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[Taragolis]

is wif stands for Web Identity Federation ?

[Taragolis]

In general looks fine, just need to fix tests and Static Checks, it could be done by install pre-commit, enable it and run linters/formatters against your changes.

In additional I think it could be nice to add link to AwsS3Data spec:
https://cloud.google.com/storage-transfer/docs/reference/rest/v1/TransferSpec#AwsS3Data somewhere into the docstring/comment because it take some time to figure out is it allowed values or not for someone like me who do not use this Operator

[Taragolis]

You've forgot to mock AwsBaseHook, you need to add @mock.patch("airflow.providers.google.cloud.operators.cloud_storage_transfer_service.AwsBaseHook")

[github-actions]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed in 5 days if no further activity occurs. Thank you for your contributions.