[BUGFIX] Missing localizeChildrenAtParentLocalization for CSV tests

The "localizeChildrenAtParentLocalization" behaviour needs to be
set to automatically localize children for IRRE CSV functional
tests as well.

Resolves: #56819
Releases: 6.2
Change-Id: I14a09e715ad9674922776de450d519583770e0f5
Reviewed-on: https://review.typo3.org/28299
Reviewed-by: Oliver Hader
Tested-by: Oliver Hader