Fix GodotSpace3D::test_body_motion() not setting local_shape

[adamscott]

After studying and much debugging...

I compared these lines...

godot/modules/godot_physics_2d/godot_space_2d.cpp

Lines 967 to 973 in 893bbdf

	rcd.object = col_obj;
	rcd.shape = shape_idx;
	rcd.local_shape = j;
	bool sc = GodotCollisionSolver2D::solve(body_shape, body_shape_xform, Vector2(), against_shape, col_obj_shape_xform, Vector2(), _rest_cbk_result, &rcd, nullptr, margin);
	if (!sc) {
	continue;
	}

with those.

godot/modules/godot_physics_3d/godot_space_3d.cpp

Lines 971 to 976 in 893bbdf

	rcd.object = col_obj;
	rcd.shape = shape_idx;
	bool sc = GodotCollisionSolver3D::solve_static(body_shape, body_shape_xform, col_obj->get_shape(shape_idx), col_obj->get_transform() * col_obj->get_shape_transform(shape_idx), _rest_cbk_result, &rcd, nullptr, margin);
	if (!sc) {
	continue;
	}

Mmmm. godot_space_3d.cpp seems to have a line missing.
So I added the line missing.

And it works. (!!?!?!)

Fixes #75069

[adamscott]

And it works. (!!?!?!)

I'm joking. It really works and it makes sense.

[rburing]

Looks good. +1

[grazianobolla]

What did this cause?

[akien-mga]

Thanks!