Harvest multiple values from one parameter
Harvest multiple values from one parameter

The new modifier is '-multi'.

Doesn't work with claim types besides wikibase-item.

Bug: T87689
Change-Id: Ied808405a21213e165d51b3fe3d79dfd883e58c0

wikimedia/pywikibot-core,PersianWikipedia/pywikibot-core,wikimedia/pywikibot-core