Usability issue with skops

[tuscland]

Even with bona fide scikit-learn estimators, skops might fail to recognize some properties as trusted, and therefore fail to load the saved object. We should work around this limitation by temporarily disabling skops's security feature until we are able to put more efforts in supporting it.

At save time, query skops to get the list of warnings. Save the list on the side, then at load time, provide the skops with the "trusted" list.