[test] Move AppVeyor web settings into .appveyor.yml
[test] Move AppVeyor web settings into .appveyor.yml

Shame we can't add also passwords (as we don't want forks
to use Pywikibot-test and Pywikibot-oauth accounts)

Bug: T248782
Change-Id: If48ad82b8b77cfc7aa2abf1b4748557fac7ca1a2

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