Fix bugs in blockforest code

runtime/boundary_weights.hpp

runtime/domain/ParticleDataHandling.hpp

runtime/domain/block_forest.cpp

runtime/domain/block_forest.hpp

runtime/domain/domain_partitioning.hpp

runtime/domain/regular_6d_stencil.hpp

runtime/interfaces/last_generated.hpp

runtime/pairs.cpp

runtime/pairs.hpp

runtime/tracked_variable.hpp

src/pairs/code_gen/cgen.py

src/pairs/ir/variables.py

src/pairs/sim/simulation.py