cubicweb-fastimport #4155894 embed the regids that are already open-coded within the hooks runner [resolved]

Or else we have nasty surprises.

prioritynormal
typebug
done in0.2.0
load0.100
load left0.000
closed by#6c2092a9b96a deferred hooks handling: complete the test
patchdeferred hooks handling: complete the test [applied][test,entities] provide a basic test [applied]