[runtime] Don't consume exception if not allowed to

[runtime] Don't consume exception if not allowed to

The thread_state indicates whether we have a pending exception that needs to be consumed (be it sync or async). Normally we check the state before calling mono_thread_execute_interruption, but make sure we don't consume an exception if the thread_state doesn't allow us to (we can have an abort requested but mono_thread_clear_interruption_requested can return FALSE if we are inside an abort protected block and shouldn't process it)