[BUGFIX] No version overlay should be done for sys_language

The tables sys_language and static_languages do not support
versioning. Therefore, when doing a version preview, no
version overlay should be applied to them.

Change-Id: I37be782601fc37e78a74d2459b6f246c5107b701
Fixes: #37892
Releases: 6.2, 6.1, 6.0
Reviewed-on: https://review.typo3.org/23203
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters