Remove dependency of EnergyData on t_state

Remove dependency of EnergyData on t_state

EnergyData used a t_state object to calculate the conserved energy.
This responsibility is now given to the respective temperature /
pressure control algorithms. This allows to remove the dependency
of EnergyData on t_state.

This also introduces the conserved energy as a test quantity in the
tests comparing legacy and modular simulator code paths.

Refs #3419