[BUGFIX] Ignore l10n_state when detaching localization parent

When an exisiting localization (sys_language_uid>0 and l10n_parent>0)
shall be detached (l10n_parent=0), the processing the l10n_state value
was skipped - basically since the processor assumes no adjustments
would be required.

The state is provided by FormEngine and is expected to be serialized
to JSON again in DataMapProcessor - in this case, the modifications
are just skipped as well.

Resolves: #102623
Releases: main, 12.4
Change-Id: Ifb400924fbdd8dcc20b8ff15d3b870507141b612
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/82170


Tested-by: core-ci <typo3@b13.com>
Tested-by: Oliver Hader <oliver.hader@typo3.org>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>