Basic functioning of system versioning in Spider: UPDATE, DELETE,
DELETE HISTORY, AS OF, FROM .. TO, BETWEEN .. AND.

More testing should be done for:
LOAD DATA, joins, derived tables, multi-update/delete and what else?

Note that we are still using HA_CAN_DIRECT_UPDATE_AND_DELETE, but not
for periods in DELETE (fwiw there is condition
!table_list->has_period(), but it is missing in UDPATE).