MOM6: Merge branch 'Hallberg-NOAA-diabatic_aux_cleanup' into dev/gfdl

- NOAA-GFDL/MOM6@382e035 Merge branch 'Hallberg-NOAA-diabatic_aux_cleanup' into dev/gfdl
- NOAA-GFDL/MOM6@623842d Merge branch 'diabatic_aux_cleanup' of https://github.com/Hallberg-NOAA/MOM6 into Hallberg-NOAA-diabatic_aux_cleanup
- NOAA-GFDL/MOM6@ed19740 Merge branch 'dev/gfdl' of github.com:NOAA-GFDL/MOM6 into dev/gfdl
- NOAA-GFDL/MOM6@fb6b8e1 Merge pull request #921 from marshallward/dd
- NOAA-GFDL/MOM6@5a59262 * Bugfix: Double diffusive correction to Kd
- NOAA-GFDL/MOM6@6d0c938 +Revised writeMessageAndDesc to split long lines
- NOAA-GFDL/MOM6@6db9631 +Added newlines in long parameter descriptions
- NOAA-GFDL/MOM6@d927495 +Corrected spelling errors in documentation
- NOAA-GFDL/MOM6@550308c +Corrected documentation of HALF_STRAT_DEPTH
- NOAA-GFDL/MOM6@62c113e +Added MIN_SALINITY as a new runtime parameter.
- NOAA-GFDL/MOM6@dc35d3a +(*)Revised the diagnostic subML_N2
- NOAA-GFDL/MOM6@2015e63 (*)Revised propagate_int_tide code for symmetry