[packman] FFMPEG Vulkan support

[idesmi at protonmail.com]

Hi,
I have been trying to use the filter `scale_vulkan` without success, to discover that ffmpeg distributed in the Packman repos does not come with Vulkan support enabled in build.
Could you please add it? It's been available since version 4.3, and we're now at 4.4

Thanks in advance.
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