[BUGFIX] Adjust renderForeignRecordHeader to array

The FormDataProvider refactoring changed DB values
from strings to arrays when used with select fields.
The code usage in InlineRecordContainer is adopted to
use the new data structure.

Resolves: #70951
Releases: master
Change-Id: Id992232c36521622a06fbd8892e66398dcede35c
Reviewed-on: https://review.typo3.org/44254


Reviewed-by: Sebastian Fischer <typo3@evoweb.de>
Tested-by: Sebastian Fischer <typo3@evoweb.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>