Eliminate _gfs _gdas, etc, variables

[DavidHuber-NOAA]

What new functionality do you need?

Following #2943, it should be possible to eliminate most, if not all, variables ending with _RUN from the config files and scripts. This will help simplify the resource calculations as well as the workflow and workflow setup scripts.

What are the requirements for the new functionality?

The majority, if not all, of the variables ending with _RUN are removed and replaced with if or case blocks when setting.

Acceptance Criteria

• No changes to workflow XMLs
• All CI tests are replicable

Suggest a solution (optional)

No response