Create a way to make any collider on a part grabbable

[JonnyOThan]

Many of the handles in HabTech2 don't have ladder colliders, so you can't grab them. We should make a way to just mark a part as being grabbable on any of its colliders. I don't think this should necessarily apply to every part, because smooth cylindrical fuel tanks probably shouldn't be grabbable. But maybe it should be default and the fuel tanks opt-out.