For pipeline, olap table sink close is divided into three stages, try_close() --> pending_finish() --> close()
only after all node channels are done or canceled, pending_finish() will return false, close() will start.
this will avoid block pipeline on close().
In close, check the index channel intolerable failure status after each node channel failure,
if intolerable failure is true, the close will be terminated in advance, and all node channels will be canceled to avoid meaningless blocking.
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