Merge branch 'darincomeau/ocn/revert-sorrm-ocn-ic' (PR #7388)

Revert spun-up ocean IC back to cold-start for SORRME3r3

Changes the ocean spun-up initial condition that was set in #6758 back
to the 'cold-start' initial condition. There was concern using the
initial condition interpolated from the v2.1 spinup was baking in warm
biases in the Southern Ocean.

Ocean initial condition file is staged in public inputdata repo,
world-readable.

[BFB] for all currently tested configurations
[non-BFB] only for B-cases with the SOwISC12to30E3r3 ocean mesh

Author: jonbob

components/mpas-ocean/cime_config/buildnml

@@ -415,8 +415,8 @@ def buildnml(case, caseroot, compname):
         ic_date = '20240829'
         ic_prefix = 'mpaso.SOwISC12to30E3r3'
         if ocn_ic_mode == 'spunup':
-            ic_date = '20241023'
-            ic_prefix = 'mpaso.SOwISC12to30E3r3.interpFrom2p1-anvil'
+            ic_date = '20240829'
+            ic_prefix = 'mpaso.SOwISC12to30E3r3.rstFromG-chrysalis'
         if ocn_glc_ismf_coupling == 'data_mpaso':
             data_ismf_file = 'prescribed_ismf_paolo2023.SOwISC12to30E3r3.20241017.nc'