cubicweb-subprocess #6379406 delete stdout/stderr File entities when a subprocess is deleted [validation pending]

prioritynormal
typeenhancement
done in0.3.0
load0.200
load left0.000
closed by#b48758555ee0 [schema] stdout/stderr should be deleted if their related process is deleted
patch[schema] stdout/stderr should be deleted if their related process is deleted [applied]