dedicated cleanup task for runner

[clr2of8]

This is an update to the Invoke-AtomicRunner code that will use two different scheduled tasks, one to run the atomic and one to run the cleanup. This is because in some cases, AV kills the original process due to the atomic it is running, which means the cleanup and reboot actions never happen and the runner stops running things. By using two different scheduled tasks (and hence two different processes) we can avoid this issue and keep things running

Note: You will need to rerun Invoke-SetupAtomicRunner to get the new schedule task after this update

[clr2of8]

This didn't work as expected. I addressed the issue a different way in PR #171