Allow CLM by PFT history outputs with FATES nocomp

I'm running CLM-FATES and would like to output some CLM variables by vegtype using hist_dov2xy = .false. and hist_type1d_pertape = 'PFTS'. This is incompatible with FATES at the moment, because itypes are not set if FATES is on. This makes sense in full FATES but could actually work in nocomp, where each PFT is on its own patch.

Discussing with @mvdebolskiy the possibility of adding an 'if nocomp' statement where itype gets set in [clmfates_interfaceMod](https://github.com/NorESMhub/CTSM/blob/5acb791d72f2bd7c8b5ceb1497f6466c8b248056/src/utils/clmfates_interfaceMod.F90#L1048).