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

Backport of #11896

testing/freeze/create_executable.py

@@ -1,8 +1,10 @@
 """Generate an executable with pytest runner embedded using PyInstaller."""
+
 if __name__ == "__main__":
-    import pytest
     import subprocess
 
+    import pytest
+
     hidden = []
     for x in pytest.freeze_includes():
         hidden.extend(["--hidden-import", x])

testing/freeze/runtests_script.py

@@ -5,6 +5,7 @@ pytest main().
 
 if __name__ == "__main__":
     import sys
+
     import pytest
 
     sys.exit(pytest.main())

testing/freeze/tox_run.py

@@ -2,6 +2,7 @@
 Called by tox.ini: uses the generated executable to run the tests in ./tests/
 directory.
 """
+
 if __name__ == "__main__":
     import os
     import sys