[BUGFIX] FormEngine: Don't resolve IRRE children for new records

When creating new records the Inline data provider tries to resolve
child records for a NEWhash uid, leading to RelationHandler returning
all possible children.

Skip resolving children for records that have a NEWhash local UID.

Resolves: #70102
Releases: master
Change-Id: I96ac6188cfe360fdee949a38c5eaf25cb6698c5d
Reviewed-on: http://review.typo3.org/43562


Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Frank Nägler <frank.naegler@typo3.org>
Tested-by: Frank Nägler <frank.naegler@typo3.org>