Test only @doc scenarios for documentation branches

As decided in #10492 (closed), we don’t want to run the whole test suite on branches that only change the Tails documentation, but only scenarios that rely on the documentation shipped within Tails.

We need to adapt our wrapper to the test suite so that it runs only scenarios tagged as @doc for this branches.

Feature Branch: puppet-tails:feature/10707-run-doc-tests-on-doc-branches

Parent Task: #10153 (closed)

Related issues

• Related to #10492 (closed)
• Blocked by #10706 (closed)

Original created by @bertagaz on 10707 (Redmine)