This is implemented as a static Line.Rasterize(Point p1, Point p2) function
that returns an array of Points. There's also a Line.Rasterize(x1, y1, x1, y2)
version for convenience.
Unit tests included.
GitOrigin-RevId: 525098f8c76c6c3d1a6ff2c32fa2206cff080a11
