The service list report has been moved from EXT:sv to EXT:reports.
Because of the new location the namespace of the class ServicesListReport has been changed from TYPO3\CMS\Sv\Report to TYPO3\CMS\Reports\Report. Additionally the relevant language file has been moved from EXT:/sv/Resources/Private/Language/locallang.xlf to EXT:/reports/Resources/Private/Language/serviceReport.xlf.
Service API in "TYPO3 Explained"