[hooks] Delete some properties cached on entities schema on schema updates cubicweb.schema add two additional @cachedproperty that should be cleared when in-memory schema is modified. This may leads to e.g. attempt to delete some already dropped relations. Related to #16130960

usr/lib/python2*/*-packages/cubicweb/entities/
usr/lib/python2*/*-packages/cubicweb/ext/
usr/share/cubicweb/cubes/
usr/lib/python2*/*-packages/cubicweb/*.py