Add NSSL microphysics to the CCPP

[grantfirl]

Description

The NSSL MP scheme should be added to the authoritative CCPP repo because "the NSSL scheme is used in NSSL's daily FV3 convection-allowing forecasts, and the scheme itself is aimed at this scale (dx <= 4km). Testing is underway also with a preliminary Warn-on-Forecast FV3 ensemble", according to @MicroTed. The SRW App in particular needs this.

Solution

• Add NSSL code to ccpp-physics
• Add support for additional hydrometeor species in GFDL_atmos_cubed_sphere
• Add support for new variables, etc. in fv3atm (particularly GFS_typedefs)
• Add SDFs as appropriate in fv3atm
• Add RTs to exercise the new scheme in ufs-weather-model

Alternatives

None

Related to

NCAR/ccpp-physics#761
NOAA-EMC/fv3atm#472
NOAA-GFDL/GFDL_atmos_cubed_sphere#171
#1032
NCAR/ccpp-scm#277