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We support VK_KHR_dedicated_allocation so we must fill VkMemoryDedicatedRequirements.

Vulkan spec states:

 "[...] requiresDedicatedAllocation may be VK_TRUE under one of the
 following conditions:

 The pNext chain of VkImageCreateInfo for the call to vkCreateImage used
 to create the image being queried included a VkExternalMemoryImageCreateInfo
 structure, and any of the handle types specified in
 VkExternalMemoryImageCreateInfo::handleTypes requires dedicated allocation,
 as reported by vkGetPhysicalDeviceImageFormatProperties2 in
 VkExternalImageFormatProperties::externalMemoryProperties.externalMemoryFeatures,
 the requiresDedicatedAllocation field will be set to VK_TRUE."

All handle types require dedicated allocation at the moment.

Fixes:

 dEQP-VK.api.external.memory.opaque_fd.dedicated.image.info
 dEQP-VK.memory.requirements.dedicated_allocation.buffer.regular
 dEQP-VK.memory.requirements.dedicated_allocation.image.transient_tiling_optimal