Evaluate(partially) reasoning enhanced hotpot.

[ConstFr]

Enhanced hotpot questions by:
cot_prompt = """QUESTION
Let's think step by step.
"""

HF dataset: denis1699/hotpot_cot

Added 8bit quantization due to the lack of memory locally.

[ConstFr]

Added benchmark for reasoning enhanced HotpotQA. Evaluated through:

CUDA_VISIBLE_DEVICES=0 polygraph_eval \
    --config-dir=./examples/configs/ \
    --config-name=polygraph_eval_cot_hotpot.yaml \
    model.path=meta-llama/Llama-3.2-3B-Instruct

from root.