* Add support for vulkan_video.cppm module
Fix#2151
* Add a module version for the Video test
Currently this add vulkan_video.cppm to the VulkanHppModule target,
which might not be what we want (maybe guard this by an option(), or add
another target like VulkanVideoHppModule, etc.).
* Add a separate target for `vulkan_video.cppm`
* Extract common logic to `vulkan_hpp__setup_module`
* Fix several CMakeLists.txt issues
- Add `vulkan_video.cppm` to `VK_GENERATED_VULKAN_HEADERS`.
- Remove unnecessary ${ARGN} quotes.
- Move version checks out of `vulkan_hpp__setup_module`.
- Separate `FILE_SET_NAME` from `FILE_SET`.
btmxh