Opens up 1x1 hellscape on kutjevo, removes ledges in combat zone (#5793)

# About the pull request

As title, the 1x1 cave area is quite strange but cool so I wanted to
open it up slightly and provide a new route into that building east of
Botony I also removed ledges in that southern flank area and some
strange unbreakable walls, lastly I fixed the broken thermals

# Explain why it's good for the game

1x1s kind of suck, I like the addition of the new rotation and I think
the amount of unbreakable walls on kutjevo is weird

# Testing Photographs and Procedure
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# Changelog
:cl: SpartanBobby
maptweak: Make a few unabreakable walls on kutjevo breakable, touches
the east botony caves flanks ands removes some ledges from combat routes
/:cl: