Base: Rename Base::freecad_dynamic_cast into freecad_cast

This is to make it shorter and easier to use. QT does the same thing
with their qobject_cast.

src/Mod/CAM/Gui/ViewProviderPath.cpp

@@ -111,8 +111,7 @@ public:
         }
         Base::Matrix4D linkMat;
         auto linked = sobj->getLinkedObject(true, &linkMat, false);
-        auto vp = Base::freecad_dynamic_cast<ViewProviderPath>(
-            Application::Instance->getViewProvider(linked));
+        auto vp = freecad_cast<ViewProviderPath>(Application::Instance->getViewProvider(linked));
         if (!vp) {
             setArrow();
             return;