WsSQLClient executepreparedStatement response should be updated

ws_workunits_struct.ECLWorkunit has changed, causing HPCC > 8.8.0 responses to include unknown fields:

Executing: Select * from benchmark::string::100MB as mytable ; on Cluster: hthor
ERROR HPCCWsSQLClient HPCCWsSQL.executeSQLFullResponse encountered RemoteException.
Unexpected subelement {urn:hpccsystems:ws:wssql}ExecuteCost
Executing: Select * from benchmark::string::100MB as mytable ; on Cluster: hthor
ERROR HPCCWsSQLClient HPCCWsSQL.executeSQLFullResponse encountered RemoteException.
Unexpected subelement {urn:hpccsystems:ws:wssql}ExecuteCost
Executing: Select * from benchmark::string::100MB as mytable ; on Cluster: hthor
ERROR HPCCWsSQLClient HPCCWsSQL.executeSQLFullResponse encountered RemoteException.
Unexpected subelement {urn:hpccsystems:ws:wssql}ExecuteCost
Preparing sql: Select * from benchmark::string::100MB as mytable  where mytable.fill != ?on cluster: hthor
ERROR HPCCWsSQLClient HPCCWsSQL.prepareSQL encountered RemoteException.
Unexpected subelement {urn:hpccsystems:ws:wssql}ExecuteCost
community_8.8.0-closedown0
executing: Select * from benchmark::integer::20kb
ERROR HPCCWsSQLClient HPCCWsSQL.executeSQLFullResponse encountered RemoteException.
Unexpected subelement {urn:hpccsystems:ws:wssql}ExecuteCost