force gemma-2 on a100

src/backend/run_eval_suite_lighteval.py

@@ -29,6 +29,8 @@ def run_evaluation(eval_request: EvalRequest, task_names: str, batch_size: int,
     img_versions = ['2.0.2', '1.4.5']
     if 'google/gemma-2' in eval_request.model:
         img_versions = ['sha-3ea8259']
+        instance_size = 'x2'
+        instance_type = 'nvidia-a100'
     for img_version in img_versions:
         args = DefaultNamespace(**{
                 "model_config": dict(model=dict(