library: Require VpFunctions objects

[christophe-lunarg]

Remove VP_USE_OBJECT to require VpCapabilities, this will also enable removing VkInstance instance from many API

VPAPI_ATTR VkResult vpGetPhysicalDeviceProfileSupport(
#ifdef VP_USE_OBJECT
    VpFunctions                                functions,
#endif//VP_USE_OBJECT
    VkInstance                                  instance,
    VkPhysicalDevice                            physicalDevice,
    const VpProfileProperties*                  pProfile,
    VkBool32 *pSupported) {
    uint32_t count = 0;