cam6_4_089: Update externals to match alpha06f and bring in timestamped rpointer files

[cacraigucar]

Closes #1293
Close #1294

[peverwhee]

thanks @cacraigucar !

[cacraigucar]

@jedwards4b and @fischer-ncar - I am getting the following error for ERC tests on NAG. An example is here: /scratch/cluster/cacraig/aux_cam_nag_20250425135254/ERC_D_Ln9.f10_f10_mg37.QPWmaC6.izumi_nag.cam-outfrq3s.GC.aux_cam_nag_20250425135254

The only changes are bringing in Jim's timestamped rpointer branch and the externals to match alpha06f

File "/scratch/cluster/cacraig/aux_cam_nag_20250425135254/ERC_D_Ln9.f10_f10_mg37.QPWmaC6.izumi_nag.cam-outfrq3s.GC.aux_cam_nag_20250425135254/./case.build", line 267, in <module> _main_func(__doc__)
File "/scratch/cluster/cacraig/aux_cam_nag_20250425135254/ERC_D_Ln9.f10_f10_mg37.QPWmaC6.izumi_nag.cam-outfrq3s.GC.aux_cam_nag_20250425135254/./case.build", line 226, in _main_func test = find_system_test(testname, case)(case)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/cacraig/cam_rpointer_again/cime_config/SystemTests/erc.py", line 24, in __init__ RestartTest.__init__(self, case,
File "/home/cacraig/cam_rpointer_again/cime/CIME/SystemTests/restart_tests.py", line 22, in __init__ SystemTestsCompareTwo.__init__(
File "/home/cacraig/cam_rpointer_again/cime/CIME/SystemTests/system_tests_compare_two.py", line 146, in __init__ self._setup_cases_if_not_yet_done()
File "/home/cacraig/cam_rpointer_again/cime/CIME/SystemTests/system_tests_compare_two.py", line 450, in _setup_cases_if_not_yet_done
self._setup_cases()
File "/home/cacraig/cam_rpointer_again/cime/CIME/SystemTests/system_tests_compare_two.py", line 540, in _setup_cases self._case_one_setup()
File "/home/cacraig/cam_rpointer_again/cime/CIME/SystemTests/restart_tests.py", line 36, in _case_one_setup self._set_restart_interval()
File "/home/cacraig/cam_rpointer_again/cime/CIME/SystemTests/system_tests_common.py", line 222, in _set_restart_interval f"{syr:04d}{smon:02d}{sday:02d}", "%Y%m%d"
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ValueError: Unknown format code 'd' for object of type 'float'