Add basic first version of random kahypar+ #35
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Based on https://github.com/ti2-group/hybrid_contraction_tree_optimizer/
Unfortunately I just realized that the RandomOptimizer does not optimize the costmod and temperature. Not sure how I missed that while going over the code. Without that the results are much worse though. I think ideally these parameters should be randomly chosen within the optimize function for each trial. For now I just hacked it over the optimize functions, which will probably lose some performance in the accelerated rust case.