Add testing under WSL

[yarikoptic]

Can't research ATM (under which CI and how) but I think it would be very worthwhile now that we had a dedicated (as in "selfless"! ;) ) attempt to use DataLad under WSL:

• Allow to pre-fetch and then point/reuse all online materials (like hugging face models) AllenNeuralDynamics/aind-ephys-pipeline#69 (comment)