[BUGFIX] Deleted LDAP groups should be restored if needed

Fixes: #60933
Change-Id: I3e10327d4ba77759eb93a2d458ee9b08f5e4df58
Reviewed-on: http://review.typo3.org/32124
Reviewed-by: Xavier Perseguers <xavier@typo3.org>
Tested-by: Xavier Perseguers <xavier@typo3.org>