rework more deprecated code

Author: pjfanning

hibernate6/src/main/java/com/fasterxml/jackson/datatype/hibernate6/PersistentCollectionSerializer.java

@@ -307,7 +307,7 @@ private Session openTemporarySessionForLoading(PersistentCollection coll) {
         session.setHibernateFlushMode(FlushMode.MANUAL);
 
         persistenceContext.addUninitializedDetachedCollection(
-                ((SessionFactoryImplementor) _sessionFactory).getMetamodel().collectionPersister(coll.getRole()),
+                ((SessionFactoryImplementor) _sessionFactory).getMappingMetamodel().getCollectionDescriptor(coll.getRole()),
                 coll
         );
 

hibernate7/src/main/java/com/fasterxml/jackson/datatype/hibernate7/Hibernate7ProxySerializer.java

@@ -307,7 +307,8 @@ static String getIdentifierPropertyName(LazyInitializer init) {
             final SharedSessionContractImplementor session = init.getSession();
             if (session != null) {
                 SessionFactoryImplementor factory = session.getFactory();
-                return factory.getIdentifierPropertyName(init.getEntityName());
+                //TODO fixme - used to work with Hibernate 6, but not anymore
+                //return factory.getIdentifierPropertyName(init.getEntityName());
             }
             return null;
         }

hibernate7/src/main/java/com/fasterxml/jackson/datatype/hibernate7/PersistentCollectionSerializer.java

@@ -307,7 +307,7 @@ private Session openTemporarySessionForLoading(PersistentCollection coll) {
         session.setHibernateFlushMode(FlushMode.MANUAL);
 
         persistenceContext.addUninitializedDetachedCollection(
-                ((SessionFactoryImplementor) _sessionFactory).getMetamodel().collectionPersister(coll.getRole()),
+                ((SessionFactoryImplementor) _sessionFactory).getMappingMetamodel().getCollectionDescriptor(coll.getRole()),
                 coll
         );