Performance Improvement: Batch Import with a single INSERT

When batch importing multiple INSERT-statements are generated and then executed.
It should be faster to craft a single INSERT-statement with multiple VALUES to insert.

Lines affected: https://dev.quiqqer.com/quiqqer/package-translator/blob/6e8541538a4c900a3ca4b042207f130c7c204495/src/QUI/Translator.php#L678