CTSM Changes Needed with a new Ocean Mask t233

CESM is considering some changes to some points in the t232 land/ocean mask for MOM6. So the new grid would presumably be called t233. Presumably a few grid cells that are currently land would become ocean (so not run in CTSM anymore), and a few points currently ocean would become land (so would be newly run by CTSM).

This issue is just to think through how this might impact CTSM and what we'll need to do to respond to it.

- [x] Update to the new ccs_config with the new t233 grid (has mesh and mapping files for ROF)
- [ ] Change our testing to use the t233 mask (CTSM, RTM, MOSART, mizuRoute) (#2540)
- [ ] Use init_interp for the current finidat files with the t232 mask (this should just happen)
- [ ] Create new finidat files where we spinup longer to get the new land points spunup
- [ ] Full spinup with the new t233 grid to make sure everything is fully spunup

The ccs_config update will contain both a mesh file for the t233 grid to be used for fully coupled cases and a mask file that CTSM will use for offline cases. So almost all of the work for this happens in ccs_config.

Since, these changes will likely just be for a few gridcells it seems likely that initially relying on our current finidat files should be fine. However, these new land points are likely to be over glacier areas so will need to be spunup to get a reasonable snowpack. So doing a simulation for say 50 years starting from a t232 finidat file seems like it should be OK to do. Eventually, we'll redo spinup so the final step will happen anyway.