[book] replace PropagateSubjectRelation*Hook references
PropagateSubjectRelationHook, PropagateSubjectRelationAddHook and
PropagateSubjectRelationDelHook were deprecated by
PropagateRelationHook, PropagateRelationAddHook,
PropagateRelationDelHook respectively in v3.9, and removed in 3.18.
Closes #3420672
usr/bin/cubicweb-ctl usr/bin/
usr/lib/PY_VERSION/*-packages/cubicweb/cwctl.py
../cubicweb-ctl.bash_completion etc/bash_completion.d/cubicweb-ctl