Updates to cumulus convection scheme for HR2, and generalization to be able to use the prognostic closure with other convection schemes in the future

[lisa-bengtsson]

Description

Updates to cumulus convection scheme for HR2 and some generalization to be able to use the prognostic closure with other convection schemes in the future.

Solution

1. correction (bug-fix) of convective cloud condensate passed to progsigma_calc.F90 routine. The total condensate consists of three terms; suspended cloud liquid, liquid converted to rain, and liquid detrained to the environment. The third term (detrainment) was scaled by g/dp whereas the other two terms were unitless.
2. Update to only consider positive buoyant levels in integral (to make it general if a convection scheme can have negative buoyant levels between cloud base and cloud top)
3. Update to make the prognostic closure general to pass in q-tendency due to turbulence from any PBL scheme.
4. Move out computation of q-tendency due to dynamics from progsigma_clac.F90 (to samfshalcnv and samfdeepcnv) because other convection schemes compute this term in a pre/post step. I will update samf* routines to use pre/post convection in the future.

The impact of these changes on the results are small, two months verification with this update can be seen here (the PR corresponds to the experiment called prog_fix2)
https://www.emc.ncep.noaa.gov/gmb/jhan/vsdbw/progcb/