tests/event_ztimer: add regression test for crashing clear
tests/event_ztimer: add regression test for crashing clear

OlegHahm/RIOT,OlegHahm/RIOT,jasonatran/RIOT,kYc0o/RIOT,miri64/RIOT,kYc0o/RIOT,miri64/RIOT,kYc0o/RIOT,ant9000/RIOT,ant9000/RIOT,kaspar030/RIOT,jasonatran/RIOT,RIOT-OS/RIOT,ant9000/RIOT,OTAkeys/RIOT,miri64/RIOT,kaspar030/RIOT,OlegHahm/RIOT,authmillenon/RIOT,jasonatran/RIOT,jasonatran/RIOT,OTAkeys/RIOT,ant9000/RIOT,authmillenon/RIOT,authmillenon/RIOT,ant9000/RIOT,miri64/RIOT,OlegHahm/RIOT,authmillenon/RIOT,RIOT-OS/RIOT,OTAkeys/RIOT,kYc0o/RIOT,jasonatran/RIOT,OlegHahm/RIOT,RIOT-OS/RIOT,OTAkeys/RIOT,authmillenon/RIOT,authmillenon/RIOT,kaspar030/RIOT,kaspar030/RIOT,kaspar030/RIOT,RIOT-OS/RIOT,kYc0o/RIOT,RIOT-OS/RIOT,miri64/RIOT,OTAkeys/RIOT