switch to ml_configuration in agent response as backend changed

[qianheng-aws]

Description

The backend ml-commons changed its configuration field from configuration to ml_configuration and lead to error.

GET /_plugins/_ml/config/os_chat

{
  "config_type": "os_chat_root_agent",
  "ml_configuration": {
    "agent_id": "******************"
  }
}

Related change in ml-commons:
opensearch-project/ml-commons#2710

Issues Resolved

Check List

• New functionality includes testing.
  • All tests pass, including unit test, integration test.
• New functionality has user manual doc added.
• Commits are signed per the DCO using --signoff.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[Hailong-am]

would you mind add changelog for this change?

[wanglam]

Is this change target for 2.16?

[qianheng-aws]

Is this change target for 2.16?

The ml-commons related change #239 (comment) has backported to 2.16, so I think this change should target for 2.16 as well

[wanglam]

LGTM

[raintygao]

It would be better to add your change in https://github.com/opensearch-project/dashboards-assistant/blob/main/release-notes/dashboards-assistant.release-notes-2.16.0.0.md as this should be released in 2.16.

[qianheng-aws]

It would be better to add your change in https://github.com/opensearch-project/dashboards-assistant/blob/main/release-notes/dashboards-assistant.release-notes-2.16.0.0.md as this should be released in 2.16.

@raintygao But it cannot be called a feature nor bug fix. Maybe Maintenance ?

[raintygao]

It would be better to add your change in https://github.com/opensearch-project/dashboards-assistant/blob/main/release-notes/dashboards-assistant.release-notes-2.16.0.0.md as this should be released in 2.16.

@raintygao But it cannot be called a feature nor bug fix. Maybe Maintenance ?

Im okay to this.