Use proper way of overriding doctrine attributes

In older versions doctrine allowed overriding attributes, by simply redifining them in subclasses. In 2.16 this throws an exception. We now use the proper way using the AttributeOverrides attribute

src/Entity/Parts/Part.php

@@ -84,10 +84,10 @@ class Part extends AttachmentContainingDBElement
      * Overridden properties
      * (They are defined here and not in a trait, to avoid conflicts).
      ****************************************************************/
+
     /**
      * @var string The name of this part
      */
-    #[ORM\Column(type: Types::STRING)]
     protected string $name = '';
 
     /**