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/PartDesign/App/FeatureSketchBased.cpp

@@ -1449,7 +1449,7 @@ Base::Vector3d ProfileBased::getProfileNormal() const {
 
     // If the shape is a line, then return an arbitrary direction that is perpendicular to the line
     auto geom = Part::Geometry::fromShape(shape.getSubShape(TopAbs_EDGE, 1), true);
-    auto geomLine = Base::freecad_dynamic_cast<Part::GeomLine>(geom.get());
+    auto geomLine = freecad_cast<Part::GeomLine>(geom.get());
     if (geomLine) {
         Base::Vector3d dir = geomLine->getDir();
         double x = std::fabs(dir.x);