fix: added google_ml_integration extension to use alloydb ai-nl support api (googleapis#1445)

Including the google_ml_integration extension made the add_template
function work because it enabled the AI Query Engine features within the
Cloud SQL for PostgreSQL database.


http://github.com/googleapis/genai-toolbox/blob/test-genai/docs/en/samples/alloydb/ai-nl/alloydb_ai_nl.ipynb

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Author: 27 people

docs/en/samples/alloydb/ai-nl/alloydb_ai_nl.ipynb

@@ -297,7 +297,8 @@
         "setup_queries = [\n",
         "  # Install required extension to use the AlloyDB AI natural language support API\n",
         "  \"\"\"CREATE EXTENSION IF NOT EXISTS alloydb_ai_nl cascade;\"\"\",\n",
-        "\n",
+        "  \"\"\"CREATE EXTENSION IF NOT EXISTS google_ml_integration; \"\"\",\n",
+        "  \n",
         "  # Create schema\n",
         "  \"\"\"CREATE SCHEMA IF NOT EXISTS nla_demo;\"\"\",\n",
         "\n",
@@ -689,15 +690,18 @@
       "source": [
         "async def run_queries(pool):\n",
         "  async with pool.connect() as db_conn:\n",
+        "\n",
         "    # Verify the generated context for the tables\n",
         "    for query in verify_context_queries:\n",
         "      response = await db_conn.execute(sqlalchemy.text(query))\n",
         "      print(\"Verify the context:\", response.mappings().all())\n",
         "\n",
+        "      \n",
         "    # Update context that needs revision\n",
         "    for query in update_context_queries:\n",
         "      await db_conn.execute(sqlalchemy.text(query))\n",
         "\n",
+        "      \n",
         "    # The resulting context entries in the alloydb_ai_nl.generated_schema_context_view \n",
         "    # view are applied to the corresponding schema objects, and the comments are overwritten.\n",
         "    for query in apply_generated_context_queries:\n",