Reduce logging noise

[samsrabin]

As discussed at CSEG meeting 2024-06-18, reducing unnecessary messaging is a CSEG goal for CESM3.

The mosart decomp info message can probably be changed to only show if the XML DEBUG setting is true? (By wrapping in #ifndef NDEBUG/#endif)

[ekluzek]

@slevis-lmwg this is a simple thing that could be done with the other mosart work.