[WIP] Work with self_tests so that there's an initialization only option

[ekluzek]

Description of changes

Have a self_tests mode that essentially only does initialization. Change the self_tests testmod to run in this mode.

Specific notes

Contributors other than yourself, if any: @billsacks

CTSM Issues Fixed (include github issue #):
This enables work in #2995
Some work here #3295

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

Any User Interface Changes (namelist or namelist defaults changes)? Yes
Some new namelist items for testing

Does this create a need to change or add documentation? Did you do so?

Testing performed, if any: So far just running specific test cases

Definition of done:

• Merge [WIP] For testing add a framework to bypass parts of the code #3425 into here, and reconcile it
• Figure out what needs to be added to the bypass logical functions to make them more robust
• Figure out how to combine these bypass functions with the bypass already put in place for PTS_MODE without a land point
• Add functions/handling needed for the PTS_MODE configuration
• Make sure up to date with the b4b-dev branch
• Run aux_clm and decomp_init test lists, bring into b4b-dev as normal

[ekluzek]

In sprint 20 I spent a few days on this work.

This is stalled right now, because I had trouble getting the setup with SATM working. To do that, CTSM HAS to have a run section as it becomes the clock to start and stop the simulation.