Integration with Infinity (#2894)

### What problem does this PR solve?

Integration with Infinity

- Replaced ELASTICSEARCH with dataStoreConn
- Renamed deleteByQuery with delete
- Renamed bulk to upsertBulk
- getHighlight, getAggregation
- Fix KGSearch.search
- Moved Dealer.sql_retrieval to es_conn.py


### Type of change

- [x] Refactoring

docs/references/http_api_reference.md

@@ -1280,7 +1280,7 @@ Success:
                 "document_keyword": "1.txt",
                 "highlight": "<em>ragflow</em> content",
                 "id": "d78435d142bd5cf6704da62c778795c5",
-                "img_id": "",
+                "image_id": "",
                 "important_keywords": [
                     ""
                 ],

docs/references/python_api_reference.md

@@ -1351,7 +1351,7 @@ A list of `Chunk` objects representing references to the message, each containin
   The chunk ID.
 - `content` `str`  
   The content of the chunk.
-- `image_id` `str`  
+- `img_id` `str`  
   The ID of the snapshot of the chunk. Applicable only when the source of the chunk is an image, PPT, PPTX, or PDF file.
 - `document_id` `str`  
   The ID of the referenced document.