Make st_archive archive river model+DART output files

Doing data assimilation with CESM+DART generates many new types of output files,
which st-archive should archive, assuming they are named according to CESM conventions.
Many of the new files will be handled by the esp component code, but others are
more closely associated with the geophysical components and should be archived
with their files. We've chosen new file names in such a way that this can be done
with very small changes to
$component/cime_config/config_archive.xml
cime/CIME/XML/archive_base.py
A second small change is to make st-archive handle compressed files (*.gz).
This has no effect on model calculations or existing output.

We don't yet have an interface for doing data assimilation with mizuroute (or MOSART or RTM),
but we hope to, and I'm updating the config_archive files for most of CESM's other components,
so it seems efficient to do the river model(s) at the same time.
I've read that RTM is only used in paleo contexts, and MOSART is deprecated,
so I'd like advice about whether to make similar changes to the archiving in either of those.

I developed and tested the changes in a recent (2025-4-22) cesm3.0_alphabranch.
I've committed them to a feature branch based on master and pushed it to my fork of mizuRoute.
I can include more details here, or in a PR when it's time for that.

I don't have permission to add Assignees, Labels, etc., so I'm hoping that someone will fill those in,
or give me permission to.