Refactor SOLD2Net to Support Dataclasses for Configuration

[lappemic]

In the process of updating dictionary configurations to dataclasses (see #2093), I noticed that kornia.feature.sold2.backbones.SOLD2Net currently also only supports dictionaries. This restriction was addressed by using the dataclass_to_dicts function a previous commit (see details). To maintain consistency with the ongoing dataclasses for config refactoring effort, should SOLD2Net be updated to accept dataclasses directly?

[johnnv1]

Yes, although it doesn't matter as much because it's more for “internal” use, I think it's great to keep it consistent -- and I think it's more legible