NoahMP Driver Refactor for JEDI

[jmccreight]

JEDI needs to be able to access NoahMP state and other (parameter, and forcing) variables at the top level of the WRF-Hydro/NoahMP driver. The states are 2D or 3D need put into data structures with their own init() and destroy() routines. Currently we are only focused on snow states only, as a first pass. The changes should have no effect on results.

There are 4 levels to the driver:
L1: main with init and exe calls
L2: Where the 2D and 3D variables are currently defined and scoped
L3: The call to the i-j, spatial wrapper/iterator
L4: The NoahMP 1D model

The goal is to move the target variables from L2 to new data structure modules, then use these modules in L1, passing the data structures down to L2 and L3.