[Jobs] Jobs launch does not start the dashboard after starting the controller manually

[Michaelvll]

Reproduction:

1. Start a stopped controller: sky start sky-jobs-controller-<hash>
2. sky jobs launch --fast echo hi, this does not start the dashboard
   

   skypilot/sky/templates/jobs-controller.yaml.j2

   Lines 29 to 33 in 7bea468

   	# Dashboard.
   	ps aux | grep -v nohup | grep -v grep | grep -- "-m sky.spot.dashboard" | awk '{print $2}' | xargs kill > /dev/null 2>&1 || true
   	pip list | grep flask > /dev/null 2>&1 || pip install flask 2>&1 > /dev/null
   	((ps aux | grep -v nohup | grep -v grep | grep -q -- "-m sky.jobs.dashboard.dashboard") || (nohup {{ sky_python_cmd }} -m sky.jobs.dashboard.dashboard >> ~/.sky/job-dashboard.log 2>&1 &));

Version & Commit info:

• sky -v: PLEASE_FILL_IN
• sky -c: PLEASE_FILL_IN

[cg505]

Think we should probably just try to avoid having this in setup commands. I wonder how difficult it would be to just add it as a systemd service or something like this so that it's always running.