Update Vulkan Headers to 1.3.250

[juan-lunarg]

• Changes comply with the maintainer guide
• SHA512s are updated for each updated download
• The "supports" clause reflects platforms that may be fixed by this new version
• Any fixed CI baseline entries are removed from that file.
• Any patches that are no longer applied are deleted from the port's directory.
• The version database is fixed by rerunning ./vcpkg x-add-version --all and committing the result.
• Only one version is added to each modified port's versions file.

[juan-lunarg]

By default installing vulkan-headers resulted in the following message:

vulkan-headers is header-only and can be used from CMake via:

    find_path(VULKAN_HEADERS_INCLUDE_DIRS "vk_video/vulkan_video_codec_h264std.h")
    target_include_directories(main PRIVATE ${VULKAN_HEADERS_INCLUDE_DIRS})

As a result I added this usage file with the proper find_package instructions based on the official instructions from the repo.

https://github.com/KhronosGroup/Vulkan-Headers/blob/main/BUILD.md

[FrankXie05]

Note: I will be converting your PR to draft status. When you respond, please revert to "ready for review".
That way, I can be aware that you've responded since you can't modify the tags.

[FrankXie05]

The usage has been tested successfully locally.