some fixes we've been carrying in our CTS fork:
* fix UB in `command_buffer_event_sync.cpp`: enqueue of two commands in
two separate queues, with both using the same buffer argument, and no
synchronization between the commands.
* fix UB in `command_buffer_test_barrier.cpp`: missing synchronization
between zeroing command and command-buffer using two separate queues
* make `test_thread_dimensions.cpp` thread-safe to avoid spurious
errors.
* Fix format in the test scope
* Add user params to limit testing
Add parameters to reduce amount of testing.
Helpful for debugging or for machines with lower performance.
* Restore default value
* Print info only if testing params bigger than 0.
