Merge "Register Chassis_Private table in BaseOvnSbIdl" into stable/2023.1

Author: Zuul

neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/ovsdb_monitor.py

@@ -670,6 +670,8 @@ def notify(self, event, row, updates=None):
 class BaseOvnSbIdl(Ml2OvnIdlBase):
     @classmethod
     def from_server(cls, connection_string, helper):
+        if 'Chassis_Private' in helper.schema_json['tables']:
+            helper.register_table('Chassis_Private')
         helper.register_table('Chassis')
         helper.register_table('Encap')
         helper.register_table('Port_Binding')