Add Support for Federated Users' Session Tokens (via Okta, etc)

[aamclendon]

My specific use case relates to writing to AWS but am sure there are many other use cases for federated user session token support.

Specifically, using the S3 Upload tool or Athena Bulk Write (via SIMBA and Athena ODBC), the configuration works when using a IAM user, access key, and secret access key but when using a federated user via Okta there is no option to enter the session token and authentication fails.

Alteryx desktop should support federated users' session tokens.