Add AWS auth for OpenSearchDB http_auth initialization

[mauricioalarcon]

This commit introduces a new test validating the initialization of OpenSearchDB with AWSV4SignerAuth for HTTP authentication. Additionally, it updates the poetry.lock file to reflect dependencies changes with Poetry 2.1.1.

Related to #2375

Description

The current OpenSearch configuration requires username and password for authentication, which is not compliant with security policies in many enterprises that enforce AWS IAM-based authentication (e.g., AWS SigV4 via SAML or IAM roles).

This feature request proposes adding support for AWS authentication methods such as AWSV4SignerAuth or AWS4Auth, which are already supported by the opensearch-py library. This would enable seamless authentication via AWS IAM roles, improving security, compliance, and ease of integration with AWS-hosted OpenSearch domains.

Fixes # issue

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactor (does not change functionality, e.g. code style improvements, linting)
• Documentation update

How Has This Been Tested?

Augmented the current test to also exercise the new http_auth arg

• Unit Test
• Test Script (please provide)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have checked my code and corrected any misspellings

Maintainer Checklist

• closes #xxxx (Replace xxxx with the GitHub issue number)
• Made sure Checks passed

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[CLAassistant]

All committers have signed the CLA.

[mauricioalarcon]

Closing this in favor of 2399 -- that one contains these changes and the fix for an opensearch mapping.