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>

admin/server/auth.py

@@ -29,7 +29,7 @@ from api.db.init_data import encode_to_base64
 from api.db.services import UserService
 from api.db import ActiveEnum, StatusEnum
 from api.utils.crypt import decrypt
-from api.utils import get_uuid
+from common.misc_utils import get_uuid
 from common.time_utils import current_timestamp, datetime_format, get_format_time
 from api.utils.api_utils import (
     construct_response,