Merge topic 'check_language_propagate_hip_platform'

ce9c6d0994 HIP: Propagate CMAKE_HIP_PLATFORM from/to the test project in check_language
9ba3fc91e5 HIP: Really forward CMAKE_HIP_HOST_COMPILER in check_language(HIP)

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !9121