cubicweb #2086983 etype filter composant crash [resolved]

it calls select.add_etype_restriction with a variable ref instead of a variable, which is not anymore possible with rql 0.31

prioritynormal
typebug
done in3.14.1
load0.100
load left0.000
closed by#623432dc1deb [etype restriction component] rql 0.31 doesn't accept anymore a variable ref as add_type_restriction argument. Closes #2086983