BFD-3648: [Snyk] Fix for 4 vulnerabilities

[sb-benohe]

Snyk has created this PR to fix 4 vulnerabilities in the pip dependencies of this project.

Snyk changed the following file(s):

• ops/terraform/services/eft/lambda_src/sftp_outbound_transfer/requirements.txt

⚠️ Warning

aws-xray-sdk 2.12.1 requires botocore, which is not installed.
aws-encryption-sdk 3.1.1 requires boto3, which is not installed.

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• Some vulnerabilities couldn't be fully fixed and so Snyk will still find them when the project is tested again. This may be because the vulnerability existed within more than one direct dependency, but not all of the affected dependencies could be upgraded.

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[sb-benohe]

Pytests pass
note some warnings about tripleDES, which is unused.