feature: Adding deepar image (#3203)

Author: aws-rbs

src/sagemaker/image_uri_config/forecasting-deepar.json

@@ -7,6 +7,7 @@
                 "ap-east-1": "286214385809",
                 "ap-northeast-1": "633353088612",
                 "ap-northeast-2": "204372634319",
+                "ap-northeast-3": "867004704886",
                 "ap-south-1": "991648021394",
                 "ap-southeast-1": "475088953585",
                 "ap-southeast-2": "514117268639",