[Zipios] fix testing

- after #8807 testing was broken due to a linking error, the fix was proposed in https://github.com/FreeCAD/FreeCAD/pull/8807#issuecomment-1464295791

- the formatting changes were automatically done according to our current clang file

src/zipios++/collcoll.h

@@ -23,7 +23,8 @@ using std::string ;
     the same path only the one in the first added collection will
     be accessible.
 */
-class CollectionCollection : public FileCollection {
+class BaseExport CollectionCollection: public FileCollection
+{
 public:
   /** \anchor collcoll_inst_anchor
       This static method provides a singleton instance of a CollectionCollection.