✨ Reduce false negatives of CompoundOperation::isInverseOf

[ystade]

What's the problem this feature will solve?

So far the function isInverseOf in include/mqt-core/operations/CompoundOperation.hpp#L71 produces some false negatives, also see this comment.

Describe the solution you'd like

As suggested in the referenced comment, the function falttenOperations could be used to circumvent some false negatives.