Merge branch 'asm_flags_hardcoded' into 'branch_4.2'

Two flags (ln_seaiceinc and ln_temnofreeze) are hard-coded in ASM increment routine while they should be available in namelist.

See merge request devs/moi/nemoi!12

(cherry picked from commit 17646f45)

2358bcce Two flags are hard-coded that is definitively not a good idea.