cubicweb-worker #7423455 shutdown: add an option to exit killing running tasks or wait [done]

Some ... complicated IT environments make it preferable to have an instance shutdown trigger an immediate stop of the workers, regardless of what task they may be running.

We provide an option to activate such radical behaviour.

prioritynormal
typeenhancement
done in4.0.0
load0.300
load left0.000
closed by#6444553e1198 Provide an option to enable fast worker exit when the service stops
patchProvide an option to enable fast worker exit when the service stops [applied]