[Store][WIP] Implement remove method for OpenSearch store

[Copilot]

Q	A
Bug fix?	no
New feature?	yes
Docs?	no
Issues	Fix #1482
License	MIT

Thanks for assigning this issue to me. I'm starting to work on it and will keep this PR's description up to date as I form a plan and make progress.

Original prompt

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This section details on the original issue you should resolve

<issue_title>[Store][OpenSearch] Implement remove() method</issue_title>
<issue_description>Part of #1468

Implement the remove() method for the OpenSearch store.

File: src/store/src/Bridge/OpenSearch/Store.php

Method signature:

public function remove(string|array $ids, array $options = []): void;

See Pinecone implementation in src/store/src/Bridge/Pinecone/Store.php for reference.</issue_description>

<agent_instructions>Please make sure to extend existing tests, if there is one.</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes [Store][OpenSearch] Implement remove() method #1482

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