Calculate the number of parameters in INSERT query using the columns list

The column names list does not contain the create_uid nor create_date columns
instead of columns list.

Closes #14800
(grafted from 090325cb8d9f26f30613a890a02c1c339b370082)

--HG--
branch : 8.0

trytond/trytond/model/modelsql.py

@@ -1017,7 +1017,7 @@ class ModelSQL(ModelStorage):
                 vlist = (
                     s for s in grouped_slice(
                         vlist,
-                        backend.MAX_QUERY_PARAMS // (len(column_names) + 1)))
+                        backend.MAX_QUERY_PARAMS // (len(columns) + 1)))
             else:
                 vlist = ([v] for v in vlist)