cice single colum model work from:
Molly Wieringa
Chris Riedel
Cecilia Bitz

This reverts commit 0932d47.

Sea Ice Single Column Model

…register_module, adjusting style and organization to be more readable and consistent

…t that were replaced with the corresponding ones from default_model_mod

…_module, adjusting style to be more readable and consistent

…ubroutines and unused variables

…ables; use len=vtablenamelength in definition for state variable_table instead of len=NF90_MAX_NAME

…default ; removed assimilation_period_days, assimilation_period_seconds from &model_nml

Set default namelist item ‘debug’ value to 1 to not print all the additional info

…tions to use the icepack model_mod. Added a example test case that uses perturb_single_instance=.true. to the repo

…etcdf variable names for the corresponding QTYs.

Note that this commit is more for bookeeping since this subroutine will be removed from the code in the following commit. Other model_mods do not include this subroutine and the default is typically hardcoded in the model_state_variables item of the &model_nml

…comment. The rest of the model_mods do not use a subroutine like this. The default is provided in the input namelist.

Added check in place of the subroutine calll to error out if the model_stat_variables nml entry is completely empty (model_stat_variables = ‘ ’)

…test dir

… dir from the repo and include the model_nml item grid_oi. Updating source variable in model_mod

… from model_interpolate

…om the template

Co-authored-by: Helen Kershaw <20047007+hkershaw-brown@users.noreply.github.com>