Add logic for strict check of the parameters of nested dataclasses

[Kipok]

Somehow by default omegaconf ignores any extra parameters, e.g. if I add ++test=1 and test is not a supported parameter in a dataclass, it does not cause any issues (the code executes as if I didn't specify test). This can lead to potentially costly errors, when you have a typo in some parameter name and the default value is used instead. The logic in this PR ensures that any non-supported parameters will raise an error in our code.