lander: run_worker.py to use script rather than jenkins
This converts the run_worker.py script of the lander to use our own scripts rather than Jenkins. It will run each step using a new command lander_process_ticket.py and store those under /var/log/ci-tickets
The publish action had to change how its run as well. The current working directory its run from may not have write access, so we stream the output to stdout and a buffer that we then put into swift