cubicweb #3005576 crash w/ add_cube and inheritance [validation pending]

it blindly add infered relations which later cause a crash

prioritynormal
typebug
done in3.17.4
load0.100
load left0.000
closed by#4415209bea0a [migration] when adding a cube, skip infered relations (closes #3005576)
patch[migration] when adding a cube, skip infered relations (they will be recalculated later). Closes #2981477 [applied]