Remove returns in final clause of S3ToDynamoDBOperator (#43456)

* Remove returns in final clause of S3ToDynamoDBOperator

* remove temp table in finally

* remove duplicate log

Co-authored-by: rom sharon <33751805+romsharon98@users.noreply.github.com>

* remove except statement

* remove test case

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Co-authored-by: rom sharon <33751805+romsharon98@users.noreply.github.com>

providers/src/airflow/providers/amazon/aws/transfers/s3_to_dynamodb.py

@@ -240,7 +240,7 @@ def _load_into_existing_table(self) -> str:
         finally:
             self.log.info("Delete tmp DynamoDB table %s", self.tmp_table_name)
             client.delete_table(TableName=self.tmp_table_name)
-            return dynamodb_hook.get_conn().Table(self.dynamodb_table_name).table_arn
+        return dynamodb_hook.get_conn().Table(self.dynamodb_table_name).table_arn
 
     def execute(self, context: Context) -> str:
         """