[PathFinding] Add collision methods in the path finding behavior

[D8H]

This is extracted from: https://github.com/4ian/GDevelop/pull/2284

It was manually checked with a version of the example that allow to switch between the 3 collision methods and change the cell size: https://www.dropbox.com/s/bvi963sqv96fs2h/PathFindingExample.zip?dl=1

It may not be a good idea after all because more optimized methods will come with other side effects and we probably want to jump to these directly without this PR.