vk: Persist debug name in the image wrapper to aid in debugging

rpcs3/Emu/RSX/VK/vkutils/image.cpp

@@ -304,6 +304,8 @@ namespace vk
 
 			_vkSetDebugUtilsObjectNameEXT(m_device, &name_info);
 		}
+
+		m_debug_name = name;
 	}
 
 	image_view::image_view(VkDevice dev, VkImage image, VkImageViewType view_type, VkFormat format, VkComponentMapping mapping, VkImageSubresourceRange range)

rpcs3/Emu/RSX/VK/vkutils/image.h

@@ -33,6 +33,7 @@ namespace vk
 		VkImageAspectFlags m_storage_aspect = 0;
 
 		rsx::format_class m_format_class = RSX_FORMAT_CLASS_UNDEFINED;
+		std::string m_debug_name;
 
 		void validate(const vk::render_device& dev, const VkImageCreateInfo& info) const;