VKPixelBuffer is used by external render engines to allocate buffers
using the same GPU backend that Blender runs in.
In a later stage we should test what exact binding flags are needed. I
expect that it should be able to use as a transfer buffer to copy the
pixels over to a texture using transfer commands.
Pull Request: https://projects.blender.org/blender/blender/pulls/105741
cf2c9fe186