Consolidate set_meta into update_document (#14045)

### What problem does this PR solve?

Consolidate "set_meta" API into "update_document" .

Before consolidation
Web API: POST /api/v1/document/set_meta
Http API - PUT /v1/datasets/<dataset_id>/document/<document_id>

After consolidation, Restful API -- PUT
/v1/datasets/<dataset_id>/document/<document_id>

### Type of change

- [x] Refactoring

test/testcases/test_web_api/test_chunk_feedback/__init__.py

@@ -1,16 +0,0 @@
-#
-#  Copyright 2025 The InfiniFlow Authors. All Rights Reserved.
-#
-#  Licensed under the Apache License, Version 2.0 (the "License");
-#  you may not use this file except in compliance with the License.
-#  You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-#  Unless required by applicable law or agreed to in writing, software
-#  distributed under the License is distributed on an "AS IS" BASIS,
-#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-#  See the License for the specific language governing permissions and
-#  limitations under the License.
-
-__all__ = []