Revert coupler_types changes from 2022.01#952

Merged

rem1776 merged 1 commit into

NOAA-GFDL:mainfrom

GFDL-Eric:fix_coupler_type

Apr 8, 2022

Commits on Apr 7, 2022

Reinstated the mpp_io routines and put them at the end for future elimination.
GFDL-Eric
committed