Stream lookup join type annotation error

[ulya-sidorina]

Failed ut:

KqpJoinOrder.TPCDS16
KqpJoinOrder.TPCDS88
KqpJoinOrder.TPCDS61
KqpJoinOrder.TPCDS90
KqpJoinOrder.TPCDS94
KqpJoinOrder.TPCDS95

error:

<main>: Error: Execution, code: 1060 <main>:12:1: Error: At tuple, At tuple, At tuple <main>:34:1: Error: At function: OrderedFlatMap, At function: TopSort <main>:17:34: Error: At function: AggregateMergeManyFinalize, At function: Extend, At function: FlatMap, At function: AggregateCombine, At function: ExtractMembers, At function: DqJoin, At function: DqJoin, At function: DqJoin, At function: DqJoin, At function: DqCnUnionAll, At function: TDqOutput, At function: DqStage, At function: DqStage <main>: Error: Unexpected stage input FlatMap