Updates in helper script for updated cupid workflow

[TeaganKing]

Description of changes: This PR will include additional parameters in the helper script which generates the cupid configuration file to account for a more flexible cupid workflow.

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[mnlevy1981]

I'll be adding cime_config/config_tool.xml, which can be used by CIME to generate env_postprocessing.xml in a CESM case directory. @ekluzek suggested we have preview_namelists generate the config.yml file used by CUPiD in the CESM workflow in RUN_ANALYSIS=TRUE. I don't know what that looks like, but I wanted to leave a comment here to remember to look into it later (it would mean moving some of the setup from ccs_config's template.cupid to a different script that could be invoked by preview_namelists; I think that script would also be in cime_config/).