Update QWEN_TOOL_PROMPT

[yueqis]

What does this PR do?

Modify QWEN_TOOL_PROMPT to have aligned format with hf apply chat template.
Currently, the qwen template output does not align with the hf apply chat template output when tools are included. Specifically, QWEN_TOOL_PROMPT in LLaMA-Factory/src/llamafactory/data/tool_utils.py contains <|im_end|>\n at the end, and self.format_system in LLaMA-Factory/src/llamafactory/data/template.py will add another <|im_end|>\n to the end of the formatted system prompt, causing there to be two sets of <|im_end|>\n in the system prompt when using tools.

Fixes # (issue)
N/A

Before submitting

• Did you read the contributor guideline?
• [] Did you write any new necessary tests?

[hiyouga]

LGTM