test(integration): fix typing issue on python 3.12

Author: mikonse

.github/workflows/ci.yml

@@ -108,7 +108,6 @@ jobs:
   #     matrix:
   #       python-version:
   #       - "3.12"
-  #       - "3.13"
   #       os: [ubuntu-latest]
   #   steps:
   #     - uses: actions/checkout@v5

tests/integration/test_packages.py

@@ -2,7 +2,6 @@
 import tempfile
 from dataclasses import dataclass
 from pathlib import Path
-from typing import Generator
 
 import pytest
 from debmagic.common.utils import run_cmd
@@ -73,7 +72,7 @@ class Environment:
 
 
 @pytest.fixture(scope="session")
-def test_env() -> Generator[Environment]:
+def test_env():
     with tempfile.TemporaryDirectory() as test_tmp_dir:
         test_dir = Path(test_tmp_dir)
         image_name = _prepare_docker_image(test_dir, "debian", "trixie")