Some tests with CICE5 for CESM2_3 fail on the generate phase

Start in CIME/hist_utils.py at generate_baseline and _generate_baseline_impl, using the reported GENERATE traceback and failing history filename as the entry point. Reproduce one of the listed longer tests if the test environment is available, then verify that the generate phase recognizes the CICE5 history file and completes successfully.

Longer tests (months) fail on the generate phase because the history file name is "cice" rather than "cice5"

SMS_Lm3_Vmct.f19_f19_mg16.FLT2000ClimoC6I5Slim.cheyenne_intel.slim-Monthly GENERATE
SMS_Lm3_Vmct.f19_g16.ELT2000ClimoTESTC5I5Slim.cheyenne_gnu.slim-global_uniform_g16_SOM GENERATE
SMS_Lm3_Vmct.f19_g16.ELT2000ClimoTESTC5I5Slim.cheyenne_intel.slim-global_uniform_g16_SOM GENERATE

2023-06-09 16:59:46: Exception during GENERATE:
ERROR: ERROR: cant find model name cice5 in SMS_Lm3_Vmct.f19_g16.ELT2000ClimoTESTC5I5Slim.cheyenne_intel.slim-global_uniform_g16_SOM.GC.slim41_cesm2_3_beta1chintelasl.cice.h.0001-03.nc
Traceback (most recent call last):
  File "/glade/work/erik/slim_cesm21/cime/CIME/SystemTests/system_tests_common.py", line 555, in _phase_modifying_call
    function()
  File "/glade/work/erik/slim_cesm21/cime/CIME/SystemTests/system_tests_common.py", line 785, in _generate_baseline
    success, comments = generate_baseline(self._case)
  File "/glade/work/erik/slim_cesm21/cime/CIME/hist_utils.py", line 666, in generate_baseline
    allow_baseline_overwrite=allow_baseline_overwrite,
  File "/glade/work/erik/slim_cesm21/cime/CIME/hist_utils.py", line 604, in _generate_baseline_impl
    offset >= 0, "ERROR: cant find model name {} in {}".format(model, hist)
  File "/glade/work/erik/slim_cesm21/cime/CIME/utils.py", line 166, in expect
    raise exc_type(msg)
CIME.utils.CIMEError: ERROR: ERROR: cant find model name cice5 in SMS_Lm3_Vmct.f19_g16.ELT2000ClimoTESTC5I5Slim.cheyenne_intel.slim-global_uniform_g16_SOM.GC.slim41_cesm2_3_beta1chintelasl.cice.h.0001-03.nc