Create test for running cases with cam7 nextsw_cday_calc?

Coupled cases are run with nextsw_cday_calc, so maybe we should do the same for offline cases? Just to make things as close as possible to coupled cases? This would just be for clm6_0 physics. We could also make it standard to run with hourly SW radiation to be more similar to coupled cases. Although for the latter that should be turned off certainly for 1PT forcing, and only used for large gridded forcing datasets with temporal frequencies of an hour or more.