tests: Add BufferImageCopy tests
tests: Add BufferImageCopy tests

Added new test cases to MiscImageLayerTests for valid usage checks
on VkBufferImageCopy data.

Change-Id: I858b76199b3ff936f15a2cf1adc1b5df5e76d0b1

KhronosGroup/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers