Feat: Even if the knowledge base has slices, the chunk method can be changed #7115 (#7201)

### What problem does this PR solve?

Feat: Even if the knowledge base has slices, the chunk method can be
changed #7115

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/pages/add-knowledge/components/knowledge-setting/configuration/common-item.tsx

   const { t } = useTranslate('knowledgeConfiguration');
   const form = Form.useFormInstance();
   const handleChunkMethodSelectChange = useHandleChunkMethodSelectChange(form);
-  const disabled = useHasParsedDocument();
   const parserList = useSelectChunkMethodList();
 
   return (
     >
       <Select
         placeholder={t('chunkMethodPlaceholder')}
-        disabled={disabled}
         onChange={handleChunkMethodSelectChange}
         options={parserList}
       ></Select>