Base: Use explicit pointer syntax for freecad_cast (#20694)

* Base: Use explicit pointer syntax for freecad_cast

This aligns our custom cast with other casts

* All: Use explicit pointer syntax for freecad_cast

src/Tools/params_utils.py

@@ -1197,7 +1197,7 @@ class Property:
             )
         cog.out(
             f"""
-    if (auto prop = freecad_cast<{self.type_name}>(
+    if (auto prop = freecad_cast<{self.type_name}*>(
             obj->getPropertyByName("{self.name}")))
     {{
         if (prop->getContainer() == obj)