cubicweb #15538317 Drop index on entities.type [validation pending]

it's very costly and probably not that useful (though that should be investigated at first)

prioritynormal
typeenhancement
done in3.24.0
load left0.000
closed by#b49684ddd543 [repository] Drop the index on entities.type, #51c160677afe [repository] Drop the entities.extid column and associated cache
patch[repository] Drop the index on entities.type [applied][repository] Drop the index on entities.type [applied][rql2sql] Stop generating SQL query from RQL using entities.type [applied][repository] Drop the entities.extid column and associated cache [applied]