cubicweb #2901079 drop ``from_controller`` from object other that WebRequest [validation pending]

controller is a web application concept. it should not appears on dbapi and server session.

prioritynormal
typeenhancement
done in3.19.0
load0.250
load left0.000
closed by#a1cee6915ea3 [req] drop from_controller on non WebRequest object (Closes #2901079)
patch[req] drop from_controller on non WebRequest object (Closes #2901079) [applied]