Add gpt2 to eval queue

gpt2_eval_request_False_float16_Original.json

@@ -0,0 +1 @@
+{"model": "gpt2", "base_model": "", "revision": "main", "private": false, "precision": "float16", "weight_type": "Original", "status": "PENDING", "submitted_time": "2023-07-24T16:02:26Z", "model_type": "pretrained"}