Merge topic 'add-dpclang' into release-4.5

c7ab581812 ci: Add job testing DPClang on Linux
4ea5eba8de ci: Add scripts to install DPClang in Linux jobs
21213ae1d9 DPClang: add compiler support

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !12634