Raster.set_mask() raise error if data not loaded

[rhugonnet]

A while ago we changed the behaviour to implicit loading everywhere in the package, instead of error raising: If .data needs to be called, it's loaded in memory by default without message.
However set_mask() still raises an error if the data is not loaded, which escaped us somehow:

geoutils/geoutils/raster/raster.py

Line 1855 in 04b170a

raise AttributeError("self.data must be loaded first, with e.g. self.load()")