Hadoop-based ingestion

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Support for Apache Hadoop-based ingestion was removed from Apache Druid 37.0.0. Please use SQL-based ingestion or native batch instead.

The associated materialized-view-selection and materialized-view-maintenance contrib extensions were also removed as part of this since they only supported Hadoop based ingestion.

Note that Druid still supports using druid-hdfs-storage as deep storage and other Hadoop ecosystem extensions and functionality that was not specific to Hadoop-based ingestion.