Merge topic 'htg-gcg-partitioned'

88fea33d HTG GCG Partitioned: add release note
00440c91 HTG GCG: support setting input controller
291b4803 Test HTG GCG in partitioned case
aa4b4413 HTG GCG: PartitionedDataSet support
7d4a8c36 HTG GCG Internals: add missing import
871a8c9f HTG GCG: support PartitionedDataSet input
1a685845 GCG: Warn properly for HTG inputs

Acked-by: Kitware Robot <kwrobot@kitware.com>
Tested-by: buildbot <buildbot@kitware.com>
Merge-request: !11912