PR #1495's fix for the nvfortran build error didn't address CMake

[cenamiller]

The CMake build (-DMPAS_CORE=atmosphere -DMPAS_COMPILER=nvhpc, added in #1286) fails with the same NVFORTRAN-S-0290-Unexpected continuation line error in setup_packages.inc that #1495 fixed for the Makefile build. Looks like the CMake build never defines CPRPGI, so the #ifdef CPRPGI guard gen_pkg_debug_info (in src/tools/registry/gen_inc.c) that fixed the make build doesn't work here.

The Makefile's nvhpc: target explicitly adds -DCPRPGI to CPPFLAGS when building the registry-generator tool:

"CPPFLAGS = $(MODEL_FORMULATION) -D_MPI -DCPRPGI" )

Neither the top-level CMakeLists.txt nor src/tools/registry/CMakeLists.txt sets CPRPGI and nvfortran fails compiling setup_packages.inc

Here is an example of the failure: https://github.com/NCAR/MPAS-Model-CI/actions/runs/35262905040/job/105342840422

mkdir build && cd build
cmake .. -DMPAS_CORE=atmosphere -DMPAS_COMPILER=nvhpc -DMPAS_PRECISION=double
cmake --build .

Fails at ~98% with:

NVFORTRAN-S-0290-Unexpected continuation line (.../build/src/core_atmosphere/setup_packages.inc: 107)
  0 inform,   0 warnings,   1 severes, 0 fatal for atm_setup_sfclayer_package

Proposed fix:

Similarly to what was done in the Makefile, define CPRPGI when compiling the registry tool for the nvhpc compiler branch in CMake. In CMakeLists.txt's MPAS_COMPILER STREQUAL nvhpc branch, something like:

target_compile_definitions(<registry-tool-target> PRIVATE CPRPGI)