activate ABL with ORCA2_ICE_PISCES config in SETTE
ABL is not currently tested in SETTE, which frequently breaks its compatibility with the rest of the code.
So I propose to activate it by default in SETTE with the ORCA2_ICE_PISCES configuration.
Concretely, CORE atmospheric forcing files will be replaced by ERA-interim ABL forcing files for wind components, temperature and humidity, and ln_abl
option will be switched on. Note that theses forcing files are still compatible with ln_blk
option if needed.