Merge topic 'more-cps-metadata'

755a24ccae CPS: Add export support for [default_]license
fba540daf6 project: Add SPDX_LICENSE argument
f0b419c473 Help: Tweak project DESCRIPTION documentation

Acked-by: Kitware Robot <kwrobot@kitware.com>
Tested-by: buildbot <buildbot@kitware.com>
Merge-request: !10894