Merge topic 'vtkModule-file-set-opt-in'

500e6ffe cmake: enable FILE_SET usage
e3ea4895 vtkModule: add a way to control FILE_SET usage

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: buildbot <buildbot@kitware.com>
Reviewed-by: David Gobbi <david.gobbi@gmail.com>
Merge-request: !10691