gc.collect() before unlinking the db in some tests

python/cpython#97641

Author: altendky

chia/simulator/setup_services.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import asyncio
+import gc
 import logging
 import signal
 import sqlite3
@@ -147,6 +148,8 @@ async def setup_full_node(
     service.stop()
     await service.wait_closed()
     if db_path.exists():
+        # TODO: remove (maybe) when fixed https://github.com/python/cpython/issues/97641
+        gc.collect()
         db_path.unlink()