Hadoop-based ingestion

Support for ingestion based on Apache® Hadoop 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 extensions were also removed as part of this since they only supported ingestion based on Hadoop.

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