change: add sa-west-1 to PyTorch training image URI config (#6516)

Author: Yadan-Wei

sagemaker-core/src/sagemaker/core/image_uri_config/pytorch.json

@@ -3141,6 +3141,7 @@
                     "me-west-1": "124382933778",
                     "mx-central-1": "637423239942",
                     "sa-east-1": "763104351884",
+                    "sa-west-1": "434457397001",
                     "us-east-1": "763104351884",
                     "us-east-2": "763104351884",
                     "us-gov-east-1": "446045086412",
@@ -3190,6 +3191,7 @@
                     "me-west-1": "124382933778",
                     "mx-central-1": "637423239942",
                     "sa-east-1": "763104351884",
+                    "sa-west-1": "434457397001",
                     "us-east-1": "763104351884",
                     "us-east-2": "763104351884",
                     "us-gov-east-1": "446045086412",
@@ -3243,6 +3245,7 @@
                     "me-west-1": "124382933778",
                     "mx-central-1": "637423239942",
                     "sa-east-1": "763104351884",
+                    "sa-west-1": "434457397001",
                     "us-east-1": "763104351884",
                     "us-east-2": "763104351884",
                     "us-gov-east-1": "446045086412",