public static DataStream<HoodieRecord> bootstrap(
            Configuration conf,
            RowType rowType,
            DataStream<RowData> dataStream) {
        return bootstrap(conf, rowType, dataStream, false, false);
    }
Constructs bootstrap pipeline as streaming.
The bootstrap operator loads the existing data index (primary key to file id mapping),
then sends the indexing data set to subsequent operator(usually the bucket assign operator).
inlong-sort/sort-flink/sort-flink-v1.15/sort-connectors/hudi/src/main/java/org/apache/inlong/sort/hudi/sink/utils/Pipelines.java