fix(schema): add vocabulary_source on PlaceEntry

cubicweb_eac/migration/1.2.0_Any.py

+add_relation_definition("PlaceEntry", "vocabulary_source", "ConceptScheme")
+drop_relation_definition("AgentPlace", "vocabulary_source", "ConceptScheme")

cubicweb_eac/schema.py

@@ -669,7 +669,7 @@ class source_agent(RelationDefinition):
 
 
 class vocabulary_source(RelationDefinition):
-    subject = ("Mandate", "LegalStatus", "AgentFunction", "AgentPlace", "Occupation")
+    subject = ("Mandate", "LegalStatus", "AgentFunction", "PlaceEntry", "Occupation")
     object = "ConceptScheme"
     cardinality = "?*"