CPU usage is misreported.

Currently "0 CPU" means "no CPU metric received in the previous ProfileEvents packet". But there can be many ProfileEvents packets and only a few with CPU increment.

That's why the CPU metric shows something weird like:
```
0
0
0
0
0
1234
0
0
0
...
```

This is unbearable, and the CPU metric should be either fixed or removed altogether.
thread_times[host_name][thread_id].user_ms = value;
            else if (event_name == system_time_name)
                thread_times[host_name][thread_id].system_ms = value;
            else if (event_name == MemoryTracker::USAGE_EVENT_NAME)
                thread_times[host_name][thread_id].memory_usage = value;
        }
        auto elapsed_time = profile_events.watch.elapsedMicroseconds();
        progress_indication.updateThreadEventData(thread_times, elapsed_time);
        if (need_render_progress)
            progress_indication.writeProgress();
        if (profile_events.print)
        {
            if (profile_events.watch.elapsedMilliseconds() >= profile_events.delay_ms)
            {
                initLogsOutputStream();
                progress_indication.clearProgressOutput();
                logs_out_stream->writeProfileEvents(block);
                logs_out_stream->flush();
                profile_events.last_block = {};
            }
            else
            {
                incrementProfileEventsBlock(profile_events.last_block, block);
            }
        }
        profile_events.watch.restart();
    }
}
/// Flush all buffers.
void ClientBase::resetOutput()