nacos config init , and force add ts parms. (#20526)

Signed-off-by: zhanluxianshen <zhanluxianshen@163.com>

api/configs/remote_settings_sources/nacos/http_request.py

             sign_str = tenant + "+"
         if group:
             sign_str = sign_str + group + "+"
-        if sign_str:
-            sign_str += ts
+        sign_str += ts  # Directly concatenate ts without conditional checks, because the nacos auth header forced it.
         return sign_str
 
     def get_access_token(self, force_refresh=False):