Use linux.8xlarge.memory for llama3_2_text_decoder

Author: huydhn

.ci/scripts/gather_test_models.py

@@ -25,7 +25,7 @@
         "resnet50": "linux.4xlarge.memory",
         "llava": "linux.4xlarge.memory",
         "llama3_2_vision_encoder": "linux.4xlarge.memory",
-        "llama3_2_text_decoder": "linux.4xlarge.memory",
+        "llama3_2_text_decoder": "linux.8xlarge.memory",
         # This one causes timeout on smaller runner, the root cause is unclear (T161064121)
         "dl3": "linux.4xlarge.memory",
         "emformer_join": "linux.4xlarge.memory",