[8.0.x] Replace reorder-python-imports by isort due to black incompatibility (#11898)

Backport of #11896

testing/example_scripts/acceptance/fixture_mock_integration.py

@@ -1,4 +1,5 @@
 """Reproduces issue #3774"""
+
 from unittest import mock
 
 import pytest

testing/example_scripts/unittest/test_setup_skip.py

@@ -1,4 +1,5 @@
 """Skipping an entire subclass with unittest.skip() should *not* call setUp from a base class."""
+
 import unittest
 
 

testing/example_scripts/unittest/test_setup_skip_class.py

@@ -1,4 +1,5 @@
 """Skipping an entire subclass with unittest.skip() should *not* call setUpClass from a base class."""
+
 import unittest
 
 

testing/example_scripts/unittest/test_setup_skip_module.py

@@ -1,4 +1,5 @@
 """setUpModule is always called, even if all tests in the module are skipped"""
+
 import unittest
 
 

testing/example_scripts/unittest/test_unittest_asyncio.py

@@ -1,7 +1,6 @@
 from typing import List
 from unittest import IsolatedAsyncioTestCase
 
-
 teardowns: List[None] = []
 
 

testing/example_scripts/unittest/test_unittest_asynctest.py

@@ -1,10 +1,10 @@
 """Issue #7110"""
+
 import asyncio
 from typing import List
 
 import asynctest
 
-
 teardowns: List[None] = []