[TASK] Drop remaining getIndpEnv() in NewRecordController

Change-Id: Ic5382b1705be90cb7b7ae66d4832c1fb0ba44da8
Resolves: #84391
Related: #84341
Releases: master
Reviewed-on: https://review.typo3.org/56266


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>