Update ConfirmEdit integration to match master

The ConfirmEdit extension has been updated to take a WikiPage instead
of an EditPage to SimpleCaptcha::shouldCheck.  This patch updates
flow to match that development.

Fixes T78200

Bug: T78200
Change-Id: I9650f56cafb22ef073b06768da9889fbb940f348
Merge "Update ConfirmEdit integration to match master"