Cleanup of RRTMGP Interstitials

[dustinswales]

Description

Remove excessive interstitial variables used by the RRTMGP scheme.

Solution

Identify instances when creating RRTMGP fields in the GFS_interstitial_type can be avoided by using fields directly from GFS_statein_type.

@ChunxiZhang-NOAA

[ChunxiZhang-NOAA]

Description

Remove excessive interstitial variables used by the RRTMGP scheme.

Solution

Identify instances when creating RRTMGP fields in the GFS_interstitial_type can be avoided by using fields directly from GFS_statein_type.

@ChunxiZhang-NOAA

@dustinswales Thank you Dustin. Let's work on this issue in the near future.