Fix a bunch of mover bugs (#9999)

* Fix a bunch of mover bugs

Just regressions from random things

* Fix vehicle movement I guess

Content.Shared/Movement/Systems/SharedMoverController.cs

@@ -114,7 +114,8 @@ namespace Content.Shared.Movement.Systems
             }
 
             UsedMobMovement[mover.Owner] = true;
-            var weightless = _gravity.IsWeightless(mover.Owner, physicsComponent, xform);
+            // Specifically don't use mover.Owner because that may be different to the actual physics body being moved.
+            var weightless = _gravity.IsWeightless(physicsComponent.Owner, physicsComponent, xform);
             var (walkDir, sprintDir) = GetVelocityInput(mover);
             var touching = false;