Add skip_test trigger variable
Defaults to "false". If set to "true", this will remove the setup and test jobs from the pipeline.
This is necessary for aws as long as we have no working test setup there (blocked by kpet-db/upt).
With this commit, it is possible to enable pipeline CI on AWS with the GitLab bot.
Sits on top of the only/except/rules rework of !730 (merged).
Edited by Michael Hofmann