Implemented `jord==-6` for YPPM/XPPM

[FlorianDeconinck]

Option for yppm/xppm are limited and do not match the -6 of hord_dp used in the FP case.

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• Port and validate the code

[FlorianDeconinck]

NOAA-GFDL#29 on hold because of NASA/NOAA difference to resolve.

But GEOS ready branch as it merged: NOAA-GFDL@7314847