CountBdDaemons() was using `bd daemon list --json` which triggers
daemon auto-start as a side effect. During shutdown verification,
this caused a new daemon to spawn after all daemons were killed,
resulting in "bd daemon shutdown incomplete: 1 still running" error.
Replaced all `bd daemon killall` calls with pkill in:
- stopBdDaemons()
- restartBdDaemons()
Changed CountBdDaemons() to use pgrep instead of bd daemon list.
Also removed the now-unused parseBdDaemonCount helper function and its tests.
66805079de