Translation Platform: cronjob don't check against the correct pid

Originally created by @hefee on #16612 (Redmine)

Currently the cron job is stalled, because it just checks against an invalid pid:
In /tmp/weblate-cronjob.pid:
9746
and ps aux | grep 9746:
19746

I added a patch for this in hefee/dev/translation-server branch. I also found some more issues with weblate component handling.

Please merge my complete branch, like always ;D

Feature Branch: https://salsa.debian.org/hefee/puppet-tails/tree/hefee/dev/translation-server

Parent Task: tails#15079 (closed)