Improve performance by migrating to Clipper2 2.0.1 (#15969)

Co-authored-by: Rodrigo Faselli <162915171+RF47@users.noreply.github.com>

src/libslic3r/Algorithm/LineSplit.hpp

@@ -50,7 +50,7 @@ SplittedLine split_line(const PathType& path, const ExPolygons& clip, bool close
     // Convert the input path into an open ZPath
     ClipperZUtils::ZPath p;
     p.reserve(path.size() + (closed ? 1 : 0));
-    ClipperLib_Z::cInt z = 0;
+    coord_t z = 0;
     for (const auto& point : path) {
         p.emplace_back(point.x(), point.y(), z);
         z++;