test: isolate CI summary and output files

tests/test_netbird_runtime.py

@@ -7,11 +7,14 @@ import tempfile
 import unittest
 from pathlib import Path
 
+from ci_test_case import IsolatedCITestCase
+
 ROOT = Path(__file__).resolve().parents[1]
 
 
-class NetbirdRuntimeTests(unittest.TestCase):
+class NetbirdRuntimeTests(IsolatedCITestCase):
     def setUp(self):
+        super().setUp()
         self.temp = tempfile.TemporaryDirectory()
         self.addCleanup(self.temp.cleanup)
         self.root = Path(self.temp.name)