Converting Held Suarez Simple Model parameters into namelist parameters

### Issue Type

Other (please describe below)

### Issue Description

This is a change to add certain parameters from the Held-Suarez Simple model to the namelist to enable easy updating without recompilation. This is intended to match nomenclature from the original paper (Held and Suarez, 1994). At least 4 parameters will be added to the namelist, currently two of these are const parameters and two are floating point values embedded in calculations, as the former involve a transform to a per seconds value, it might involve an additional parameter added to the namelist.

In file: /components/cam/src/physics/simple/held_suarez_cam.F90

parameters:
efolda
efolds

In the held_suarez_run loop:
value 60 (known as "delta_T_y" in paper)
value 10 (known as "delta_theta_z" in paper)

### Will this change answers?

No

### Will you be implementing this yourself?

Yes, but I will need some help