Missing files for LePetitPrince

[ferponcem]

In drago, for all subjects, we have only some of the fsaverage5 and fsaverage7 derivatives.
Specifically, we only have the effect_size_maps for the ffx effects.

The stat_maps, the ap and pa derivatives and the volumetric maps are missing, see example in derivatives/sub-04/ses-27

[bthirion]

Hm, it's typically a case where the derivatives are not well defined (like movie watching). Not sure what to do about that. But let's keep the issue open for now.

[ferponcem]

Yes! This is the same case for LePetitPrice, GoodBadUgly and MonkeyKingdom.
To be discussed 👀