Do not store in transaction cache instances of Reference fields

If the target of the Reference field is deleted, the transaction cache is not
cleared because there is no "ON DELETE" support for Reference field. Instead
the ids are checked in the Reference.get method.

Closes #12599

trytond/trytond/model/modelstorage.py

@@ -1811,7 +1811,8 @@ class ModelStorage(Model):
             # create browse records for 'remote' models
             no_local_cache = {'binary'}
             if not transaction.readonly:
-                no_local_cache |= {'one2one', 'one2many', 'many2many'}
+                no_local_cache |= {
+                    'one2one', 'one2many', 'many2many', 'reference'}
             for data in read_data:
                 id_ = data['id']
                 to_delete = set()