feat(surface): major work on implementing surface constraints in a presciption agnostic manner

tests/operators/kernels/barotropic_closure_kernels.cpp

@@ -72,7 +72,10 @@ TEST_CASE(
 
     constexpr double enthalpyValue  = 0.8;
 
-    const double densityValue       = barotrope.density_from_enthalpy(enthalpyValue);
+    const double densityValue       = mean_field::eos::evaluate<mean_field::eos::quantity::Density>(
+                                          barotrope, mean_field::eos::SpecificEnthalpyValue{enthalpyValue}
+    )
+                                          .value();
 
     const mfem::Vector enthalpy     = project_constant(*f.enthalpyFes, enthalpyValue);