layers: Replace INVALID_EVENT check with OBJECT_INUSE
layers: Replace INVALID_EVENT check with OBJECT_INUSE

If an event being destroyed is in use, the correct error enum to use
is DRAWSTATE_OBJECT_INUSE.

KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools