fix: Fix a settingsgen issue

[mkundu1]

Fixes an issue from the following code with the latest Fluent. The code is used in PyConsole implementation.

>>> import ansys.fluent.core.solver.settings_242
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "D:\ANSYSDev\PyFluentDev\pyfluent\src\ansys\fluent\core\solver\settings_242\__init__.py", line 9, in <module>
    from .root import root
  File "D:\ANSYSDev\PyFluentDev\pyfluent\src\ansys\fluent\core\solver\settings_242\root.py", line 20, in <module>
    from .setup import setup as setup_cls
  File "D:\ANSYSDev\PyFluentDev\pyfluent\src\ansys\fluent\core\solver\settings_242\setup.py", line 18, in <module>
    from .models_1 import models as models_cls
  File "D:\ANSYSDev\PyFluentDev\pyfluent\src\ansys\fluent\core\solver\settings_242\models_1.py", line 28, in <module>
    from .battery import battery as battery_cls
  File "D:\ANSYSDev\PyFluentDev\pyfluent\src\ansys\fluent\core\solver\settings_242\battery.py", line 30, in <module>
    from .tool_kits import tool_kits as tool_kits_cls
  File "D:\ANSYSDev\PyFluentDev\pyfluent\src\ansys\fluent\core\solver\settings_242\tool_kits.py", line 19, in <module>
    from .rom_tool_kit import rom_tool_kit as rom_tool_kit_cls
  File "D:\ANSYSDev\PyFluentDev\pyfluent\src\ansys\fluent\core\solver\settings_242\rom_tool_kit.py", line 17, in <module>
    from .rom_data_creator_tool import rom_data_creator_tool as rom_data_creator_tool_cls
  File "D:\ANSYSDev\PyFluentDev\pyfluent\src\ansys\fluent\core\solver\settings_242\rom_data_creator_tool.py", line 18, in <module>
    from .transient_setup import transient_setup as transient_setup_cls
  File "D:\ANSYSDev\PyFluentDev\pyfluent\src\ansys\fluent\core\solver\settings_242\transient_setup.py", line 26, in <module>
    class transient_setup(Group):
  File "D:\ANSYSDev\PyFluentDev\pyfluent\src\ansys\fluent\core\solver\settings_242\transient_setup.py", line 46, in transient_setup
    file_name=file_name_cls,
NameError: name 'file_name_cls' is not defined. Did you mean: 'file_name_1_cls'?