[RELEASE ONLY] Fix running llava_encoder in CI

Author: guangy10

.ci/scripts/gather_test_models.py

@@ -23,7 +23,7 @@
         "w2l": "linux.12xlarge",
         "ic4": "linux.12xlarge",
         "resnet50": "linux.12xlarge",
-        "llava_encoder": "linux.4xlarge",
+        "llava_encoder": "linux.12xlarge",
         # This one causes timeout on smaller runner, the root cause is unclear (T161064121)
         "dl3": "linux.12xlarge",
         "emformer_join": "linux.12xlarge",