cubicweb #2464800 [cwctl] list commande shows incomplete diagnostic [validation pending]

When version constraints between cubes are not respected, the output message is incomplete and confusing.

prioritynormal
typebug
done in3.15.4
load0.100
load left0.000
closed by#28a346df670e [cwctl] show a better diagnostic message on version violation (closes #2464800)