Provide the configuration choice to avoid flipping Inheritance when flipping Relationship for better concept generation

[guard-who]

Considering the discussion https://fmidue.slack.com/archives/D02KJ9NKYHG/p1783782625649379, should we add a new enumeration FlipNonInheritance in RelationshipMutation and parse a corresponding predicate in Alloy to prevent the generator from flipping Inheritance. In this way, we can spare more instances and avoid getting the obviously incoherent instances with concepts.