... scheme. Passing a vector of vectors (outer for processes,
inner over the process variables) of residuum names for each
process variable.

Only HeatTransportBHE process will require Normalization feature for now. The "requireNormalization" query is set to false by default in all other processes

The matrices are not in use by any process.

shape matrix cache is now stored in the ProcessData of the concrete process

 of the entries of the global residual vector that do not need
 initial non-equilibrium compensation

Use const references where necessary.