Update needed variable transform in VADER for AODCRTM operator

[weiwilliam]

https://github.com/JCSDA-internal/vader/issues/253
For WRF-Chem, recipes for air pressure and air temperature are needed.

[weiwilliam]

Waiting for Vader PR#263 get merged

[weiwilliam]

The VADER recipes with WRF-specific variables may be removed given the development strategy. It raises the need of post-process for air_pressure from PB + P and potential temperature from T + T_base (defined from namelist) when evaluating WRF based model.