Merge topic 'nvhpc_support_new_c_and_c++_standards'

9ac426e460 NVHPC-C: Add support for C17
f5dbc27c27 NVHPC-CXX: Add support for C++20

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: Alex <leha-bot@yandex.ru>
Merge-request: !6430