Cherry pick ice_in and year_align changes from MOM6-CICE6 repo#15

Merged

anton-seaice merged 3 commits intoACCESS-NRI:1deg_jra55do_ryffrom anton-seaice:cherry-pick

Feb 1, 2024

+108-399

Commits on Jan 11, 2024

Commits on Jan 16, 2024

update start dates in ww3_shel for consistency
anton-seaice
committed