I don't think there's any reason to use the conversion context to allocate this memory, it's briefly used to build the host extension list and released right away.
-- v3: winevulkan: Fix python linter warnings. winevulkan: Drop the WINEVULKAN_QUIRK_IGNORE_EXPLICIT_LAYERS quirk. winevulkan: Use a local instance variable instead of phys_dev->instance. winevulkan: Allocate memory for VkInstanceCreateInfo with malloc. winevulkan: Allocate memory for VkDeviceCreateInfo with malloc. winevulkan: Restore utils messengers when vkCreateInstance needs more physical devices. winevulkan: Restore debug callbacks when vkCreateInstance needs more physical devices.