TYPO3 Core

Some parts of Extbase have wrong type annotations which lead to wrong results of static code analysis

- Extbase Repository->findByUid()/findByIdentifier might return null when a non-existent uid is queried
(It might be argued, that Repositories should be generics and therefore the 'object' return type should be replaced by the generic type)
- Extbase AbstractDomainObject->getUid() might return null
- Extbase Mvc Request >getOriginalRequest might return null
TYPO3\CMS\Core\Resource\ResourceFactory->getStorageObjectFromCombinedIdentifier might return null