vulkan: Add external-memory-host support #1803
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Detects the ability to import host pointers directly into the driver. Can avoid the need for staging memory in many cases such as screenshot downloads and memory uploads.
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Detects the ability to import host pointers directly into the driver(allows any
void*to be turned into avk::DeviceMemorywithout the need of a staging-buffer).Can avoid the need for staging memory in many cases such as screenshot downloads and memory uploads.