Fix CDF5 and int32 in files_for_e3sm

[xylar]

The RRSwISC6to18E3r5 mesh had mesh, initial condition and mask files that were in NetCDF4 format, not CDF5. This PR aims to fix that.

We also have seen int64 fields in masks. This should be fixed in MPAS-Dev/MPAS-Tools#603, so this PR should introduce a new MPAS-Tools version that brings in that change as well.

For the MOC mask file in inputdata, this merge also adopts the naming convention from E3SM-Project/E3SM#7165, e.g.:

RRSwISC6to18E3r5_mocBasinsAndTransects20210623mg.20250205.nc

Checklist

• Document (in a comment titled Testing in this PR) any testing that was used to verify the changes

[xylar]

Testing

I have tested this and MPAS-Dev/MPAS-Tools#603 together in:

/lcrc/group/e3sm/ac.xylar/compass_1.7/chrysalis/test_20250327/rrswisc6to18e3r5-files-for-e3sm-fix-cdf5-and-int32/ocean/global_ocean/files_for_e3sm

While not all steps have completed, I am not seeing any int64 and all output files except masks used for diagnostics are in cdf5 format as requested. (The diagnostics masks in netcdf4 format shouldn't cause any trouble.)