[TASK] Avoid asserting sys_language in functional tests

Table sys_language is legacy since language setup
is bound exclusively to site config in v11. We don't
need to import sys_language rows and assert their
state in functional tests anymore.

In preparation of the soon starting v12 deprecation
removals, the patch drops sys_language table row
imports and table state asserting in all functional
tests that use .csv file based fixtures.

Resolves: #96089
Related: #94165
Releases: master, 11.5
Change-Id: Iea752cf03bba690b5a04de7ce5718de274172e43
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/72313

Tested-by: core-ci <typo3@b13.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>