private Operation toOperation(WriteMode writeMode) {
        switch (writeMode) {
            case INSERT:
                return table.newInsert();
            case UPDATE:
                return table.newUpdate();
            default:
                return table.newUpsert();
        }
    }
Deal response when operation apply.
At MANUAL_FLUSH mode, response returns after {@link KuduSession#flush()}.
But at AUTO_FLUSH_SYNC mode, response returns after {@link KuduSession#apply(Operation)}

@param response {@link OperationResponse} response after operation done.
kudu/kudu-sink/src/main/java/com/dtstack/flink/sql/sink/kudu/KuduOutputFormat.java