Fixes#2416.
The KinematicBody::can_move_to function was likely designed for two behaviours:
- discrete: check if the body can "teleport" to the destination
- continuous: check if the direct path to the destination is valid
The continuous behaviour was however not implemented, and the discrete behaviour was broken too due to a wrong call to intersect_shape.
The discrete behaviour has thus been fixed and the function renamed to can_teleport_to for more clarity.
f33d9dab5b