Switch data ice-shelf melt rates to Paolo et al 2023

This data set is an Antarctic melt-rate climatology covering the
years 1992-2017.

The new datasets is an improvement because:
* it is more accurate than the previous Adusumilli et al. (2020)
* it includes rerouting of fluxes that are not under ice shelves
  in the MPAS-Ocean mesh
* the fluxes are carefully renormalized so that the total flux is
  identical to the original Paolo et al. dataset
* fixes the sign of the heat flux

components/mpas-ocean/cime_config/buildnml

@@ -294,7 +294,7 @@ def buildnml(case, caseroot, compname):
             ic_date = '20231121'
             ic_prefix = 'mpaso.IcoswISC30E3r5.rstFromG-chrysalis'
         if ocn_ismf == 'data':
-            data_ismf_file = 'prescribed_ismf_adusumilli2020.IcoswISC30E3r5.20231120.nc'
+            data_ismf_file = 'prescribed_ismf_paolo2023.IcoswISC30E3r5.20240227.nc'
 
     #--------------------------------------------------------------------
     # Set OCN_FORCING = datm_forced_restoring if restoring file is available