[1.20.1] Create's train contraptions dupe LL's boats again

[AnDrew0o]

Used this mods: littlelogistics-mc1.19.2-v1.3.1 littlecontraptions-forge-1.19.2.0 create-1.19.2-0.5.0.f

Previous issue: https://github.com/MuradAkh/LittleLogistics/issues/199

Reproduce in the same way as the previous time https://youtu.be/vYumGVEcopY

[EDToaster]

Was looking in to this earlier -- seems like there is no simple way to fix this :(

Create allows you to put all mobs (which technically the barges are) on a seat. When the contraption is created, the current Barge or Tug is destroyed with RemovalReason = DISCARDED, meaning we don't really have any context that the barge was copied on to a contraption.

Some fixes could be

1. Prevent seats from picking up Barges (I would rather not do this since i love the idea of a contraption on a barge on a contraption)
2. Somehow detect when a barge is part of a contraption and don't drop items