Update testlist entry for izumi and update to CICE6.6.0

.gitmodules

@@ -1,7 +1,7 @@
 [submodule "src"]
 	path = src
 	url = https://github.com/ESCOMP/CICE
-        fxtag = cice6_5_0_20241108
+        fxtag = cice6_6_0_20241120
         fxrequired = AlwaysRequired
         fxDONOTUSEurl = https://github.com/ESCOMP/CICE
 

cime_config/testdefs/testlist_cice.xml

@@ -139,7 +139,7 @@
       <machine name="mira" compiler="ibm" category="prebeta"/>
     </machines>
   </test>
-  <test name="ERS_Ld5" grid="f19_g17" compset="E1850TEST" testmods="cice/default">
+  <test name="ERS_D_Ld5" grid="f19_g17" compset="E1850TEST" testmods="cice/default">
     <machines>
       <machine name="edison" compiler="intel" category="prebeta"/>
       <machine name="izumi" compiler="nag" category="prealpha"/>