[BUGFIX] Ensures call of synchronizeFieldValues with valid arguments

Let 8.7 installtool upgrade wizard L10nModeUpdater ignore synchronization if parent entry of given translations is set to deleted

Resolves: #83940
Releases: master, 8.7
Change-Id: Ie240f71ecf42564c0547abd2dfa5c5efb23c6385
Reviewed-on: https://review.typo3.org/55758


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Tobi Kretschmann <tobi@tobishome.de>
Tested-by: Tobi Kretschmann <tobi@tobishome.de>
Reviewed-by: Joerg Kummer <typo3@enobe.de>
Tested-by: Joerg Kummer <typo3@enobe.de>
Reviewed-by: Michael Semle <michael.semle@b13.de>
Tested-by: Michael Semle <michael.semle@b13.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>