CI tests: print start/stop message + send kill

- for better debuggability
- -k to avoid hang if UG doesn't exit even after SIGTERM

Author: MartinPulec

.github/scripts/run_scheduled_tests.sh

@@ -100,8 +100,10 @@ while [ $i -lt $test_count ]; do
         fi
 
         timeout=5
-        timeout $timeout $exec $args
+        echo "Starting: \"timeout $timeout $exec $args\""
+        timeout -k 10 $timeout $exec $args
         rc=$?
+        echo "Finished: \"timeout $timeout $exec $args\" with RC %rc"
 
         if [ $rc = 124 ]; then
                 if ! expr -- "$opts" : '.*should_timeout' >/dev/null; then