fix: Opensearch serverless vector search collections - remove default _id (#2784)

* fix: Opensearch serverless vector search collections - allow no _id

Signed-off-by: Anton Kukushkin <[email protected]>

* mypy

Signed-off-by: Anton Kukushkin <[email protected]>

---------

Signed-off-by: Anton Kukushkin <[email protected]>

Author: kukushking

awswrangler/opensearch/_write.py

@@ -6,8 +6,7 @@
 import ast
 import json
 import logging
-import uuid
-from typing import Any, Generator, Iterable, Mapping
+from typing import Any, Generator, Iterable, Mapping, cast
 
 import boto3
 import numpy as np
@@ -49,7 +48,7 @@ def _actions_generator(
         if id_keys:
             _id = "-".join([str(document[id_key]) for id_key in id_keys])
         else:
-            _id = document.get("_id", uuid.uuid4())
+            _id = cast(str, document.get("_id"))
         bulk_chunk_documents.append(
             {
                 "_index": index,