Integrate JudgeArena into oellm-eval

[geoalgo]

We need to integrate JudgeArena to oellm-eval to be able to run LLM judge evaluations easily for our instructions tuned models.

Possible step recommended:

• look at PR which integrated evalchemy backend Add evalchemy backend & reasoning tasks oellm-eval#56
• iterate until a single task work in local mode
• test on LUMI