I/O Development Task - Make it possible to dump ins/outs for a specific process

When debugging a process it is nice to be able to examine the set of fields going in and the set of fields coming out. Currently in SCREAM the only way to do this is to run stand-alone, but when debugging full runs the best we can hope for is the set of initial conditions going in and the field values at the end of a single timestep.

This task would be to set up the infrastructure to write the full set of input to a process and the output from a process from within the context of a full simulation. This could be a runtime flag added to the `input.yaml` file.

We may need to figure out how to five an atmosphere process the ability to write output directly.