Undocumented entry in get_rest_info()'s dictionary

**Your Godot version:**
4.4 (issue relevant to 4.3, 4.2, 4.1 and 4.0)

**Issue description:**
DirectSpaceState's method get_rest_info() returns a dictionary that, apart from entries listed in the documentation, also contains "collider" key, with reference to the colliding body node as its value.

**URL to the documentation page:**
https://docs.godotengine.org/en/4.3/classes/class_physicsdirectspacestate3d.html#class-physicsdirectspacestate3d-method-get-rest-info