fix some st_archive issues with rpointer files

[jedwards4b]

Description of changes

Fix some issues related to timestamp rpointer files not being archived correctly.

Specific notes

Contributors other than yourself, if any: Mike Levy

CTSM Issues Fixed (include github issue #):

Are answers expected to change (and if so in what way)? NO

Any User Interface Changes (namelist or namelist defaults changes)? No

Does this create a need to change or add documentation? Did you do so? No

Testing performed, if any: will run regular and ctsm_sci
Tested archiving of fully coupled cases with DOUT_S_SAVE_INTERIM_RESTART_FILES: FALSE and
DOUT_S_SAVE_INTERIM_RESTART_FILES: TRUE

[wwieder]

Thanks for making this PR @jedwards4b we'll discuss at our weekly meeting.

[ekluzek]

Because this includes submodule updates, this will likely need to follow some other PR's with submodule updates. And the tags for submodules will all need to be done before merging.

[ekluzek]

This is straightforward and makes sense to me.

[ekluzek]

I rebased this to b4b-dev, and maybe the way to do this one, would be to bring this one as it is, and then do the other submodule updates in a different PR. They don't have to be connected together, although they all need to come together in a final tag to get the benefits.

[wwieder]

@ekluzek will merge this to b4bdev and create issues for the definition of done wrt other components

[ekluzek]

Since, this is really restricted set of changes, I just ran a case with archiving on, and made sure that worked. Jim's testing already validated the changes.