[TASK] Remove "visible fields" functional tests

Remove a bunch of functional tests that essentially
test TCA configuration:

* The tests add no crucial value from a functional
  test point of view since they don't test code but
  configuration.
* These tests have been introduced to enforce consistency
  within BE. This is a UX thing that should not be tested
  on a functional test base level, if at all.
* FormTestService is problematic from a maintenance
  point of view and needs continious changes since
  dependencies can not be handled in a good way.
* The tests are doomed to be inconsistent since they will
  never catch new fields that may have been added to
  TCA tables over time.

Resolves: #105240
Related: #78383
Releases: main
Change-Id: I29f63e4ec3eead87a9151a468eb68993b3f437cc
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/86519


Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Garvin Hicking <gh@faktor-e.de>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Garvin Hicking <gh@faktor-e.de>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>