change: add eusc-de-east-1 to PyTorch inference 2.6.0 image URI config (#6538)

Add the eusc-de-east-1 (THF) registry 204133271717 to pytorch-inference
2.6.0 so image_uris.retrieve() resolves the image in the European
Sovereign Cloud region. The account matches the existing eusc-de-east-1
entries for PyTorch training 2.9.0 and 2.10.0.

Co-authored-by: Yadan Wei <weiyadan@amazon.com>

Author: Yadan-Wei

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

@@ -1333,6 +1333,7 @@
                     "eu-west-1": "763104351884",
                     "eu-west-2": "763104351884",
                     "eu-west-3": "763104351884",
+                    "eusc-de-east-1": "204133271717",
                     "il-central-1": "780543022126",
                     "me-central-1": "914824155844",
                     "me-south-1": "217643126080",