Last Jenkins run dashboard

Originally posted on mastodon.technology.

New dashboard shows the last jenkins run for a MediaWiki extension/skin: https://tools.wmflabs.org/ci/last_run.html

I mostly made this to be able to find extensions that fail PHP 7.0 tests while it's still non-voting, and to find gaps in coverage (there's one Wikimedia-deployed extension with no voting tests :().

One day I need to unify all my CI/extension related dashboards so I'm not constantly copying code from one to another.