Remove 'get_lan_ip' and add common misc_utils.py (#10880)

### What problem does this PR solve?

Add get_uuid, download_img and hash_str2int into misc_utils.py

### Type of change

- [x] Refactoring

---------

Signed-off-by: Jin Hai <haijin.chn@gmail.com>

graphrag/search.py

@@ -21,7 +21,7 @@ import json_repair
 import pandas as pd
 import trio
 
-from api.utils import get_uuid
+from common.misc_utils import get_uuid
 from graphrag.query_analyze_prompt import PROMPTS
 from graphrag.utils import get_entity_type2samples, get_llm_cache, set_llm_cache, get_relation
 from rag.utils import num_tokens_from_string