Override truss version for Gemma (#532)

The default truss version is 0.9.119, with a corresponding
truss-transfer CLI 0.0.17. This is too old, does not work with HF
manifests correctly, likely due to
[this](basetenlabs/truss#1904).

Override to a newer truss version. Validated with a truss push.

Author: ndeepak-baseten

gemma/gemma-3-27b-it/config.yaml

@@ -57,4 +57,5 @@ runtime:
     restart_threshold_seconds: 300       # Triggers a restart if health checks fail for 5 minutes
     stop_traffic_threshold_seconds: 120  # Stops traffic if health checks fail for 2 minutes
   predict_concurrency : 8
+  truss_server_version_override: "0.11.4"
 model_name: Gemma 27B Instruct