Remove src/Shared/NcdfUtil/perl folder

[yantosca]

This PR does the following:

1. Removes the src/Shared/NcdfUtil/perl folder, which contained copies of isCoards, nc_chunk.pl, as well as some obsolete netCDF scripts. Now that we have created the new https://github.com/geoschem/netcdf-scripts folder, we no longer need to keep these scripts within the GEOS-Chem code. GEOS-Chem and HEMCO users should look to the netcdf-scripts repo for the most recent versions of netCDF utility scripts.

2. Adds a src/Shared/NcdfUtil/README.md file.

[yantosca]

See companion PR geoschem/geos-chem#1567

[yantosca]

Also tagging @jimmieln

[jimmielin]

Thanks Bob! The new netcdf-scripts repository will be very useful, thanks for letting me know about it.

[yantosca]

Integration tests pending

[yantosca]

I have merged this up to HEMCO 3.6.0. Integration tests pending.

[yantosca]

I have brought this PR up to HEMCO 3.6.0 and have resubmitted the integration tests. All GEOS-Chem Classic integration tests (with this HEMCO update) passed:

==============================================================================
GEOS-Chem Classic: Execution Test Results

Using 24 OpenMP threads
Number of execution tests: 51
==============================================================================
 
Execution tests:
------------------------------------------------------------------------------
gc_025x03125_CH4_geosfp_47L_na......................Execute Simulation....PASS
gc_025x03125_fullchem_geosfp_47L_na.................Execute Simulation....PASS
gc_05x0625_CH4_merra2_47L_na........................Execute Simulation....PASS
gc_05x0625_fullchem_merra2_47L_na...................Execute Simulation....PASS
gc_2x25_aerosol_merra2..............................Execute Simulation....PASS
gc_2x25_carbon_merra2...............................Execute Simulation....PASS
gc_2x25_CH4_merra2..................................Execute Simulation....PASS
gc_2x25_CO2_merra2..................................Execute Simulation....PASS
gc_2x25_fullchem_merra2.............................Execute Simulation....PASS
gc_2x25_Hg_merra2...................................Execute Simulation....PASS
gc_2x25_metals_merra2...............................Execute Simulation....PASS
gc_2x25_POPs_BaP_merra2.............................Execute Simulation....PASS
gc_2x25_tagCH4_merra2...............................Execute Simulation....PASS
gc_2x25_tagCO_merra2................................Execute Simulation....PASS
gc_2x25_tagO3_merra2................................Execute Simulation....PASS
gc_2x25_TransportTracers_merra2.....................Execute Simulation....PASS
gc_2x25_TransportTracers_merra2_LuoWd...............Execute Simulation....PASS
gc_4x5_aerosol_geosfp...............................Execute Simulation....PASS
gc_4x5_aerosol_merra2...............................Execute Simulation....PASS
gc_4x5_carbon_geosfp................................Execute Simulation....PASS
gc_4x5_carbon_merra2................................Execute Simulation....PASS
gc_4x5_CH4_geosfp...................................Execute Simulation....PASS
gc_4x5_CH4_merra2...................................Execute Simulation....PASS
gc_4x5_fullchem_aciduptake_merra2...................Execute Simulation....PASS
gc_4x5_fullchem_APM_merra2..........................Execute Simulation....PASS
gc_4x5_fullchem_benchmark_merra2....................Execute Simulation....PASS
gc_4x5_fullchem_complexSOA_merra2...................Execute Simulation....PASS
gc_4x5_fullchem_complexSOA_SVPOA_merra2.............Execute Simulation....PASS
gc_4x5_fullchem_geosfp..............................Execute Simulation....PASS
gc_4x5_fullchem_marinePOA_merra2....................Execute Simulation....PASS
gc_4x5_fullchem_merra2..............................Execute Simulation....PASS
gc_4x5_fullchem_merra2_47L..........................Execute Simulation....PASS
gc_4x5_fullchem_merra2_LuoWd........................Execute Simulation....PASS
gc_4x5_fullchem_RRTMG_merra2........................Execute Simulation....PASS
gc_4x5_fullchem_TOMAS15_merra2_47L..................Execute Simulation....PASS
gc_4x5_fullchem_TOMAS40_merra2_47L..................Execute Simulation....PASS
gc_4x5_Hg_geosfp....................................Execute Simulation....PASS
gc_4x5_Hg_merra2....................................Execute Simulation....PASS
gc_4x5_metals_merra2................................Execute Simulation....PASS
gc_4x5_POPs_BaP_geosfp..............................Execute Simulation....PASS
gc_4x5_POPs_BaP_merra2..............................Execute Simulation....PASS
gc_4x5_tagCH4_geosfp................................Execute Simulation....PASS
gc_4x5_tagCH4_merra2................................Execute Simulation....PASS
gc_4x5_tagCO_geosfp.................................Execute Simulation....PASS
gc_4x5_tagCO_merra2.................................Execute Simulation....PASS
gc_4x5_tagO3_geosfp.................................Execute Simulation....PASS
gc_4x5_tagO3_merra2.................................Execute Simulation....PASS
gc_4x5_TransportTracers_geosfp......................Execute Simulation....PASS
gc_4x5_TransportTracers_geosfp_LuoWd................Execute Simulation....PASS
gc_4x5_TransportTracers_merra2......................Execute Simulation....PASS
gc_4x5_TransportTracers_merra2_LuoWd................Execute Simulation....PASS
 
Summary of test results:
------------------------------------------------------------------------------
Execution tests passed: 51
Execution tests failed: 0
Execution tests not yet completed: 0

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%  All execution tests passed!  %%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

As did all of the GCHP integration tests (with this HEMCO update)

==============================================================================
GCHP: Execution Test Results

Number of execution tests: 3
==============================================================================
 
Execution tests:
------------------------------------------------------------------------------
gchp_fullchem_benchmark_merra2_c48...............Execute Simulation.....PASS
gchp_fullchem_standard_merra2_c24................Execute Simulation.....PASS
gchp_TransportTracers_geosfp_c24.................Execute Simulation.....PASS
 
Summary of execution test results:
------------------------------------------------------------------------------
Execution tests passed:        3
Execution tests failed:        0
Execution tests not completed: 0

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%  All execution tests passed!  %%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

[yantosca]

@msulprizio: Since we have already merged the logfile updates into GC and HEMCO, I think it's OK if this PR goes into GEOS-Chem 14.2.0 and HEMCO 3.7.0. Otherwise I'd have to make a HEMCO 3.6.1 version.

[msulprizio]

This is a simple PR removing files in the src/Shared/NcdfUtil/perl directory and adding a README.md file. Good to merge.