Add Django 5.1+ support for CheckConstraint condition with backward compatibility

[JaeHyuckSa]

This PR adds support for CheckConstraint.condition in Django 5.1 while maintaining backward compatibility with Django 4.2 by dynamically selecting between condition and check based on the Django version.

[JaeHyuckSa]

@RealOrangeOne The current issue with mypy is that it indicates that condition is not defined. Should this be adjusted to match the version of django-stubs?

Here is the relevant line in django-stubs:
https://github.com/typeddjango/django-stubs/blob/df12deb6b30623c0661b920a4eece8135306b55d/django-stubs/db/models/constraints.pyi#L48C1-L67C19

[RealOrangeOne]

If there's an overload, I'm surprised this is failing. If dependencies need updating, feel free to do so. Alternatively, I'm ok adding a type ignore for these lines.

[JaeHyuckSa]

If there's an overload, I'm surprised this is failing. If dependencies need updating, feel free to do so. Alternatively, I'm ok adding a type ignore for these lines.

I've added a type ignore for these lines as suggested. :)