Enhancement: WRF CMake Changes

[scrasmussen]

TYPE: enhancement

KEYWORDS: CMake, WRF, Build System

SOURCE: Soren Rasmussen and Ryan Cabell, NCAR

DESCRIPTION OF CHANGES: Branched from PR #733. Changes copied over from the new WRF hydro CMake PR.. A few additions were removed since WRF-Hydro's CMake handles NetCDF libraries differently. Style guide changes are brought over and there is cleanup in the CMakeLists.txt files. This include tabs to spaces, indentation is more consistent across files. Multiple add_depencency function calls are combined into one if able.

NOTES:

• Branched from PR Enhancement: .F to .F90 #733. That one should be merged first.
• Linking MPI changes were brought over because even though it built correctly on Derecho without them, for WRF they were needed for local builds on OSX. It's possible this failure is only in WRF but not sure.

target_link_libraries(hydro_netcdf_layer
        MPI::MPI_Fortran
)

Checklist

• Closes issue #xxxx (An issue must exist or be created to be closed. The issue describes and documents the problem and general solution, the PR describes the technical details of the solution.)
• Tests added (unit tests and/or regression/integration tests)
• Backwards compatible
• Requires new files? If so, how to generate them.
• Documentation included
• Short description in the Development section of NEWS.md

[scrasmussen]

Just making a note so it doesn't get overlooked: just need to make sure the last few commits/changes in the WRF PR#2009 are pulled in to this one so they match. After that it should be good to open this PR again.

[scrasmussen]

Brought over the last few changes from the WRF PR#2009, this PR is ready for review.