[ML] Adds a new field supported_task_types in the configuration response

[jonathan-buttner]

This PR adds a new field for the service configuration response to indicate which task types are supported by a field.

New field: supported_task_types

This field will be included in the response for each field returned.

Dependent on this PR being merged first: #119982

Example

{
  "service": "openai",
  "name": "OpenAI",
  "task_types": [
    "text_embedding",
    "completion"
  ],
  "configurations": {
    "api_key": {
      "description": "The OpenAI API authentication key. For more details about generating OpenAI API keys, refer to the https://platform.openai.com/account/api-keys.",
      "label": "API Key",
      "required": true,
      "sensitive": true,
      "updatable": true,
      "type": "str",
      "supported_task_types": [
        "text_embedding",
        "completion"
      ]
    },
    "dimensions": {
      "description": "Dimensions",
      "label": "Dimensions",
      "required": false,
      "sensitive": false,
      "updatable": false,
      "type": "str",
      "supported_task_types": [
        "text_embedding" <--- only available for text embedding
      ]
    },
    "organization_id": {
      "description": "The unique identifier of your organization.",
      "label": "Organization ID",
      "required": false,
      "sensitive": false,
      "updatable": false,
      "type": "str",
      "supported_task_types": [
        "text_embedding",
        "completion"
      ]
    },
    "rate_limit.requests_per_minute": {
      "description": "Default number of requests allowed per minute. For text_embedding is 3000. For completion is 500.",
      "label": "Rate Limit",
      "required": false,
      "sensitive": false,
      "updatable": false,
      "type": "int",
      "supported_task_types": [
        "text_embedding",
        "completion"
      ]
    },
    "model_id": {
      "description": "The name of the model to use for the inference task.",
      "label": "Model ID",
      "required": true,
      "sensitive": false,
      "updatable": false,
      "type": "str",
      "supported_task_types": [
        "text_embedding",
        "completion"
      ]
    },
    "url": {
      "default_value": "https://api.openai.com/v1/chat/completions",
      "description": "The OpenAI API endpoint URL. For more information on the URL, refer to the https://platform.openai.com/docs/api-reference.",
      "label": "URL",
      "required": true,
      "sensitive": false,
      "updatable": false,
      "type": "str",
      "supported_task_types": [
        "text_embedding",
        "completion"
      ]
    }
  }
}

[elasticsearchmachine]

Hi @jonathan-buttner, I've created a changelog YAML for you.

[elasticsearchmachine]

Pinging @elastic/ml-core (Team:ML)

[ymao1]

LGTM. Works as described. Left one optional nit.

I'm guessing there will be a followup to add the task type specific fields?

[ymao1]

nit: would it make sense to use the supportedTaskTypes defined above for the configurations that support all supported task types and just explicitly define it for the configurations that don't support all of them?

[jonathan-buttner]

Yeah, I'll make that change 👍

[jonathan-buttner]

Thanks @ymao1 !

I'm guessing there will be a followup to add the task type specific fields?

Yep that's correct. I still need to do that. I was going to do it in a separate PR.

[YulNaumenko]

LGTM! Works as expected.

[elasticsearchmachine]

💚 Backport successful

Status	Branch	Result
✅	8.x