diagnostics: handle MobileGestalt deprecation error on iOS 17.4

[AnNEDoMini]

MobileGestalt deprecated on iOS 17.4, added more clear exception message. For history:

Traceback (most recent call last):
  File "C:\Python310\lib\runpy.py", line 196, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "C:\Python310\lib\runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "C:\Users\Andrew\AppData\Roaming\Python\Python310\site-packages\pymobiledevice3\__main__.py", line 154, in <module>
    main()
  File "C:\Users\Andrew\AppData\Roaming\Python\Python310\site-packages\pymobiledevice3\__main__.py", line 101, in main
    cli()
  File "C:\Python310\lib\site-packages\click\core.py", line 1157, in __call__
    return self.main(*args, **kwargs)
  File "C:\Python310\lib\site-packages\click\core.py", line 1078, in main
    rv = self.invoke(ctx)
  File "C:\Python310\lib\site-packages\click\core.py", line 1688, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "C:\Python310\lib\site-packages\click\core.py", line 1688, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "C:\Python310\lib\site-packages\click\core.py", line 1434, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "C:\Python310\lib\site-packages\click\core.py", line 783, in invoke
    return __callback(*args, **kwargs)
  File "C:\Users\Andrew\AppData\Roaming\Python\Python310\site-packages\pymobiledevice3\cli\cli_common.py", line 134, in wrap_callback_calling
    callback(service_provider=service_provider, **kwargs)
  File "C:\Users\Andrew\AppData\Roaming\Python\Python310\site-packages\pymobiledevice3\cli\diagnostics.py", line 66, in diagnostics_mg
    print_json(DiagnosticsService(lockdown=service_provider).mobilegestalt(keys=keys), colored=color)
  File "C:\Users\Andrew\AppData\Roaming\Python\Python310\site-packages\pymobiledevice3\services\diagnostics.py", line 977, in mobilegestalt
    raise PyMobileDevice3Exception('failed to query MobileGestalt, MobileGestalt Deprecated (iOS >= 17.4)')
pymobiledevice3.exceptions.PyMobileDevice3Exception: failed to query MobileGestalt, MobileGestalt Deprecated (iOS >= 17.4)

MG on iOS 17.4 dev preview(12 pro max) answers like {'Diagnostics': {'MobileGestalt': {'Status': 'MobileGestaltDeprecated'}}, 'Status': 'Success'}