move modd_neb into modd_nebn
add a namelist nam_nebn
remove ini_neb

AROME/Meso-NH common initialisation of ice scheme

Suppression of old packing code in sedimentation_split
Suppression of sedimentation_split_momentum

Add a wrapper called twice in rain_ice instead of code duplication
Put ZLBDAS computation inside sedimentation_stat
Rewrite sedimentations to use only one horizontal dimension

Modifications to deal with different MesoNH versions

Linear and bilinear interpolations of rain_ice are put in a subroutine
The LPACK_INTERP switch allows to choose or not to pack arrays before the inerpolations.

Quentin 04/01/2023: bugfixes typo from merge of non-REPRO48 rain_ice dev from 5.5 to 5.6 (introduced in 73ec9d53)

intel big endian flag

Quentin 04/04/2022: shallow_mf_pack opti (remove obsolete packing) + add budget inside + bugfixes (missing init of variables used in structure)