ref: Make create_or_update_starter_projects async (#5165)

Make create_or_update_starter_projects async

src/backend/tests/unit/test_loading.py

@@ -22,7 +22,7 @@ from langflow.load import load_flow_from_json
 
 async def test_load_flow_from_json_object():
     """Test loading a flow from a json file and applying tweaks."""
-    result = await asyncio.to_thread(load_starter_projects)
+    result = await load_starter_projects()
     project = result[0][1]
     loaded = await asyncio.to_thread(load_flow_from_json, project)
     assert loaded is not None