Enable fates sites to be initialized, but inactive, on virtual (i.e. zero-weight) columns

[glemieux]

If I understand correctly, it is possible for a column's %active status to be dynamically updated during runtime. We currently only initialize fates to run on columns that are active during elm initialization here: https://github.com/NGEET/E3SM/blob/67abd002e90036f0c0d7baeb10b8a55a2965e7a7/components/elm/src/main/elmfates_interfaceMod.F90#L685-L689 In attempting to enable the creation of "virtual" columns that capture a time-since-fire disturbance age value, we will need to make sure that we have fates sites setup on these virtual columns, but inactive. Note that we currently check to make sure that every clump has a fates site and will end the run if it does not here: https://github.com/NGEET/E3SM/blob/67abd002e90036f0c0d7baeb10b8a55a2965e7a7/components/elm/src/main/elmfates_interfaceMod.F90#L800-L804