12.174. Release 0.83

Raptor Changes

Raptor now enables specifying the backup storage location. This feature is highly experimental.
Fix the handling of shards not assigned to any node.

Fix resource leak in query queues.
Fix NPE when writing null ARRAY/MAP to Hive.
Fix json_array_get() to handle nested structures.
Fix UNNEST on null collections.
Fix a regression where queries that fail during parsing or analysis do not expire.
Make JSON type comparable.
Added an optimization for hash aggregations. This optimization is turned off by default. To turn it on, add optimizer.optimize-hash-generation=true to the coordinator config properties.