Air density at interfaces repeated computation #318
Description
From #292 review
@nusbaume wrote:
Also I might make a comment here noting that eventually this can be replaced with a more generic variable, as there is nothing gravity-wave-specific about how it is being calculated in the interstitial scheme:
Right now rhoi is computed in both gravity_wave_drag_prepare_profiles_run and in the diffusion solver vertical_diffusion_interpolate_to_interfaces (as rhoi_dry)