Updated mediawiki/extensions
Project: mediawiki/extensions/GettingStarted  8af61def7a89dc4f99ddcacc47a6330d19b2c384

Move in required gettingstarted tour messages from GuidedTour

Add the gettingstarted messages and message documentation
that were removed from the GuidedTour extension in change I26ebc81f.

Remove unused messages

Bug: 53885
Change-Id: I694da22b1fb577db190beba5b4377caab42053fe