Redshift feature: Include STS session token in COPY CREDENTIALS. (#3307)

* Redshift feature: Include STS session token in COPY CREDENTIALS. If aws_session_token is present, append the session token. Keeps IAM_ROLE path and long-lieved keys unchanged

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Co-authored-by: Tim Hable <[email protected]>

Author: timH6502

dlt/destinations/impl/redshift/redshift.py

@@ -93,10 +93,13 @@ def run(self) -> None:
         ):
             aws_access_key = self._staging_credentials.aws_access_key_id
             aws_secret_key = self._staging_credentials.aws_secret_access_key
+            aws_session_token = self._staging_credentials.aws_session_token
             credentials = (
                 "CREDENTIALS"
                 f" 'aws_access_key_id={aws_access_key};aws_secret_access_key={aws_secret_key}'"
             )
+            if aws_session_token:
+                credentials = credentials[:-1] + f";token={aws_session_token}'"
         # get format
         file_format, is_compressed = get_file_format_and_compression(self._bucket_path)
         file_type = ""