Add ibm-granite/granite-3.1-8b-instruct to eval queue

ibm-granite/granite-3.1-8b-instruct_2025-01-11T17-23-00Z.json

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+{"model_type": "\u2b55 : instruction-tuned", "model": "ibm-granite/granite-3.1-8b-instruct", "precision": "bfloat16", "revision": "main", "add_special_tokens": "False", "llm_jp_eval_version": "v1.4.1", "vllm_version": "v0.6.3.post1", "status": "PENDING", "submitted_time": "2025-01-11T17:23:00Z"}