Do not always enforce access on resource selection

When the reference field is validated (without check access), it should not
fail for SelectionValidationError if the user has no access to the resource.

Closes #12178

trytond/trytond/ir/resource.py

@@ -34,8 +34,10 @@ class ResourceAccessMixin(ModelStorage):
         Model = pool.get('ir.model')
         ModelAccess = pool.get('ir.model.access')
         models = Model.get_name_items()
-        access = ModelAccess.get_access([m for m, _ in models])
-        return [(m, n) for m, n in models if access[m]['read']]
+        if Transaction().check_access:
+            access = ModelAccess.get_access([m for m, _ in models])
+            models = [(m, n) for m, n in models if access[m]['read']]
+        return models
 
     @classmethod
     def check_access(cls, ids, mode='read'):