Add new PDF feature to Jenkins jobs

Runs at:
- en.wikipedia.beta.wmflabs.org
- en.wikipedia.org
- test2.wikipedia

Broken at:
- commons.wikimedia.beta.wmflabs.org
- sandbox.translatewiki.net

Bug: 46224
Change-Id: Idec21c492871f4a55aaa0f1568971ccc7174cf1d