cpl_scalar fields should be initialized in non-CSG components when created

[DeniseWorthen]

Description

Non-CSG components do not use or set the scalar index for NTile. In certain cases, the scalar field value for this index has been found to be non-zero (NaN in debug compiles). This is the cause of the failure reported in #2338.

To Reproduce:

Run the case reported in #2338 and modify the required routines to print out the cpl_scalar values retrieved by CMEPS from each component.

Additional context

So far, this condition was found on a single platform and only for intel debug. I was able to force a GNU debug compile on Derecho, and the case did not fail. It has also not been seen for any component other than MOM6, even though all components (WW3, CICE and MOM6) create and set the scalar field in the same way.

Initializing the scalar field in MOM6 alone resolves #2338, but initialization should be done for all non-CSG components (those which do not use the NTile scalar).

Output