add model version to output file global attributes

[barlage]

Add the model version number extracted from the registry to the global attribute list in the NetCDF output files.

Code has been compiled with intel-mpi and a simple test has been completed to demonstrate the impact on the output files. The version line below will be added to the NetCDF outputs:

// global attributes:
                :model_name = "mpas" ;
                :core_name = "atmosphere" ;
                :version = "8.2.2" ;
                :source = "MPAS" ;