Merge branch 'atmosphere/rho_zz_int_decl' into develop (PR #1330)

This merge fixes an OpenACC "partially present" error for rho_zz_int in the
atm_advance_scalars_mono_work routine.

When compiled with OpenACC enabled using the nvfortran compiler, running with
'config_split_dynamics_transport = false' in the namelist.atmsophere file
results in a runtime error for rho_zz_int:

  FATAL ERROR: variable in data clause is partially present on the device: name=rho_zz_int(:,:)
   file:src/core_atmosphere/dynamics/mpas_atm_time_integration.F atm_advance_scalars_mono_work line:3942

The rho_zz_int array is only used if local_advance_density is true in the
atm_advance_scalars_mono_work routine, and local_advance_density is true if and
only if config_split_dynamics_transport is true.

Consequently, simulations with 'config_split_dynamics_transport = false' in the
namelist only allocate the rho_zz_int array with dimensions (1,1), rather than
the full dimensions (nVertLevels,nCells+1) that are required when
local_advance_density is true.

This difference in the allocated dimensions of rho_zz_int apparently causes
problems for the OpenACC runtime, which expects rho_zz_int to be allocated as
indicated by the explicit-shape specification, dimension(nVertLevels,nCells+1),
for the rho_zz_int dummy argument to atm_advance_scalars_mono_work.

To work around the "partially present" error, this merge changes the rho_zz_int
dummy argument to a deferred shape array, with dimension(:,:).

* atmosphere/rho_zz_int_decl:
  Fix OpenACC partially present error for rho_zz_int in atm_advance_scalars_mono_work

Author: mgduda

src/core_atmosphere/dynamics/mpas_atm_time_integration.F

@@ -4035,7 +4035,7 @@ subroutine atm_advance_scalars_mono_work(field_name, block, state, nCells, nEdge
       integer, intent(in) :: cellSolveStart, cellSolveEnd
       procedure (halo_exchange_routine) :: exchange_halo_group
       logical, intent(in), optional :: advance_density
-      real (kind=RKIND), dimension(nVertLevels,nCells+1), intent(inout), optional :: rho_zz_int
+      real (kind=RKIND), dimension(:,:), intent(inout), optional :: rho_zz_int
 
       integer :: ii,jj
       integer, dimension(10) :: ica