[Feature]: Disabling of language fallback

[ttheuerkauf]

Feature description

Currently there is no way to disable the language fallback for queries like there is in PHP:

\Pimcore\Model\DataObject\Localizedfield::setGetFallbackValues(false);

Currently there is no chance to determine if a value is really a translated value or the default value if you really have to. Therefore it would be better to disable the fallback if needed.