Merge pull request #6794 from ricardoquesada/mesh3d_squash

Adds Sprite3D and its tests
[AUTO][ci skip]: updating cocos2dx_files.json
Merge pull request #6795 from CocosRobot/update_cocosfiles_1400449896

[AUTO][ci skip]: updating cocos2dx_files.json
Point is no longer deprecated

As discussed on the forums:

- Point must not be deprecated (not it must not be used internally)
- Point2, Point3, must not be used. Use Vec2, Vec3 instead
Merge pull request #6797 from ricardoquesada/point2_fixes

Point is no longer deprecated