EAMxx: replace instances of vertical contraction with field utility

[mahf708]

Goal is to replace all instances of vertical contraction¹ (e.g., liqwaterpath, AODvis in diagnostics) with the vert_contraction<T>(reduced, original, weight) field utility. Before replacement, address issue with packs.

Footnotes

1. broadly defined, vertical contraction is any reduction across the vertical dimension (LEV/ILEV), e.g., a quantity summed/averaged over its vertical dimension. ↩

[bartgol]

For clarity: diagnostics do not have to use packs. ISince their input fields are already allocated by the time they are created, they cannot request a pack size for the inputs. As such, I am fine with diagnostics being implemented only for Real scalar type.

So if by "issue with pack" you mean "make sure vert_contraction works with packs before using it in other diags", I think you can just move forward without waiting for such fix.

[mahf708]

I was thinking for non-diags purposes, we want to support that; some physics process may calculate these contractions...

[bartgol]

Ah, sorry, then yes.