FATES LUH and LU x PFT missing value checks don't match current missing data values

[glemieux]

Describe the issue

We currently use NaN as the fill value for missing data in the FATES land use data tool output which currently presents issues for the ifx compiler used by derecho (see ESCOMP/CTSM#3764). The data sets were modified to remove the NaNs and updated per ESCOMP/CTSM#3787, but this presented issue as fates checks isnan specifically to handle missing data. The current output that ctsm master points to has had it's missing data changed to -999. See ESCOMP/CTSM#3789 for details.

Relevant log output

FATES tag

sci.1.92.0_api.44.1.0

Host land model tag

ctsm5.4.030

Machine

derecho

Other supported machine name

No response

Additional context

Note that this is not an issue for perlmutter at this time.