[!!!][TASK] Remove vC checks and deprecate veriCode() method

Since now all Backend urls have module token in place,
the veriCode is not needed any more.
Thus AbstractUserAuthentication::veriCode() is marked as deprecated,
vC parameter is not checked any more
and vC property is removed from some controllers.

Resolves: #79327
Releases: master
Change-Id: I47e459d95e8f561dcc933a832d22c86ed02aa707
Reviewed-on: https://review.typo3.org/51317


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>