cubicweb #2423719 unify set_attributes / set_relations into a cw_set method [done]

allowing similar usage as create_entity / cw_instantiate

prioritynormal
typeenhancement
done in3.16.0
load0.200
load left0.000
closed by#552de9f0c46d [entity edition] stop comparing values as it may trigger exceptions (e.g. timeseries cube tests), #e83b4a64ba29 [entity] fix deprecation warnings (closes #2423719), #ac3cbf55d9fb [entity attr cache] mark attribute as uncacheable in the underlying function else we may miss some changes., #4ba11607d84a [entity api] unify set_attributes / set_relations into a cw_set method. Closes #2423719, #c09feae04094 [entity edition] don't remove values from attribute cache on the repository side