Medical Engine - Change Unconscious animations collisionshape to be empty to allow units to walk over bodies

[kerckasha]

When merged this pull request will:

• Change the geometry shape of the unconscious animations to be empty, allowing units to move through the 'body' as if walking over them or the likes

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[kerckasha]

Just a note for something that came up on discord:
This affects physx collisions too so unconscious units can't be run over by vehicles for example.

There might be ways around it by using a new collisionshape altogether instead of the empty one

[veteran29]

Duplicate of #9603