Broken on Fedora 41 (missing python3-mock dependency)

[andreabolognani]

Installing kiwi-ng on Fedora 41 and then running it immediately results in:

[ ERROR   ]: 13:48:27 | Unexpected error:
Traceback (most recent call last):
  File "/usr/bin/kiwi-ng", line 8, in <module>
    sys.exit(main())
             ~~~~^^
  File "/usr/lib/python3.13/site-packages/kiwi/kiwi.py", line 68, in main
    App()
    ~~~^^
  File "/usr/lib/python3.13/site-packages/kiwi/app.py", line 30, in __init__
    app = CliTask(should_perform_task_setup=False)
  File "/usr/lib/python3.13/site-packages/kiwi/tasks/base.py", line 63, in __init__
    self.task = self.cli.load_command()
                ~~~~~~~~~~~~~~~~~~~~~^^
  File "/usr/lib/python3.13/site-packages/kiwi/cli.py", line 259, in load_command
    discovered_tasks[entry.name] = entry.load()
                                   ~~~~~~~~~~^^
  File "/usr/lib64/python3.13/importlib/metadata/__init__.py", line 179, in load
    module = import_module(match.group('module'))
  File "/usr/lib64/python3.13/importlib/__init__.py", line 88, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 1026, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/usr/lib/python3.13/site-packages/kiwi_stackbuild_plugin/tasks/system_stackbuild.py", line 66, in <module>
    from mock import patch
ModuleNotFoundError: No module named 'mock'

Installing the python3-mock package makes the error go away, but I shouldn't need to do that myself.