chore: standardize model evaluation configuration settings

Author: omkargaikwad23

evals/model_config.yaml

@@ -16,14 +16,12 @@ gemini_cli_version: "@google/gemini-cli@0.38.1"
 generator: gemini_cli
 env:
   GOOGLE_CLOUD_PROJECT: "ext-test-cloud-sql-postgres"
-  GOOGLE_CLOUD_LOCATION: "us-central1"
+  GOOGLE_CLOUD_LOCATION: "global"
   GOOGLE_GENAI_USE_VERTEXAI: "true"
-  GEMINI_API_MODEL: "gemini-2.5-pro"
-  GEMINI_MODEL: "gemini-2.5-pro"
 setup:
   extensions:
     "/workspace":
-      settings:
+      settings: 
         CLOUD_SQL_POSTGRES_PROJECT: "ext-test-cloud-sql-postgres"
         CLOUD_SQL_POSTGRES_INSTANCE: "daily-ci-evals-db"
         CLOUD_SQL_POSTGRES_REGION: "us-central1"