Adjust test suite to Python tails-upgrade-frontend-wrapper

Our test suite makes assumptions about tails-u-f-w that don’t hold anymore since #11753 (closed) was merged:

• at least sed -i "/^sleep 30$/d" does not work anymore
• it might be that the process name we want to kill in the recovery function has changed (python? killall -f?)

On my system this causes the “Upgrading Tails with Tails Upgrader through an incremental upgrade” scenario to take ages failing before I get bored and CTRL-C it. IIRC I’ve seen similar problems on Jenkins but I’m not 100% sure.

Feature Branch: test/15379-adjust-to-python-upgrade-wrapper

Parent Task: #11198

Related issues

• Blocks #13241 (closed)

Original created by @intrigeri on 15379 (Redmine)