anv: report HOST_ALLOCATION as supported for images
Report VK_EXTERNAL_MEMORY_HANDLE_TYPE_HOST_ALLOCATION_BIT_EXT as supported for images. It was being shown supported for buffers, but not images.
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Report VK_EXTERNAL_MEMORY_HANDLE_TYPE_HOST_ALLOCATION_BIT_EXT as supported for images. It was being shown supported for buffers, but not images.