[Bug] Ensure only supported connectors appear in the Security Solution & Agent Builder AI connector selector (elastic#244533)

## Summary

Summarize your PR. If it involves visual changes, include a screenshot
or gif.

Fix bug where unsupported connectors appeared in the security ai
assistant and agent builder connector selector.

How to test the fix:
- Set up an AI connector (inference)
- In Additional settings, make sure "text embeddings" is selected
<img width="828" height="416" alt="image"
src="https://github.com/user-attachments/assets/328d7f9c-4c4c-412c-95dd-7bcb8f37077e"
/>

(to set up a text embedding connector, I used a personal OpenAI key and
picked one of the OpenAI embedding models)

- Go to the security AI assistant and open the connector drop-down.
- Ensure your text embeddings connector does not appear.
- Check text embedding connector does not appear in the agent builder
connector selector either

Previously, the embedding connector would appear but be unusable.

Example:

Incompatible AI connector
<img width="1734" height="1784" alt="image"
src="https://github.com/user-attachments/assets/51fe0a2c-c6fe-455d-8caa-b7c437f7cc31"
/>

Compatible AI connector
<img width="1796" height="1816" alt="image"
src="https://github.com/user-attachments/assets/5ed5d7cd-b620-40ce-b46e-df5a0bf3d796"
/>

Security connector Selector should look like this:
<img width="910" height="928" alt="image"
src="https://github.com/user-attachments/assets/44dc00fb-c55f-4bf1-9e77-9f0cf2b8799e"
/>

Agent builder connector selector should look like this:
<img width="728" height="379" alt="image"
src="https://github.com/user-attachments/assets/00b15daa-1c73-44b8-b1fa-b7db3916d326"
/>

### Checklist

Check the PR satisfies following conditions.

Reviewers should verify this PR satisfies this list as well.

- [X] Any text added follows [EUI's writing
guidelines](https://elastic.github.io/eui/#/guidelines/writing), uses
sentence case text and includes [i18n
support](https://github.com/elastic/kibana/blob/main/src/platform/packages/shared/kbn-i18n/README.md)
- [X]
[Documentation](https://www.elastic.co/guide/en/kibana/master/development-documentation.html)
was added for features that require explanation or tutorials
- [X] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios
- [X] If a plugin configuration key changed, check if it needs to be
allowlisted in the cloud and added to the [docker
list](https://github.com/elastic/kibana/blob/main/src/dev/build/tasks/os_packages/docker_generator/resources/base/bin/kibana-docker)
- [X] This was checked for breaking HTTP API changes, and any breaking
changes have been approved by the breaking-change committee. The
`release_note:breaking` label should be applied in these situations.
- [X] [Flaky Test
Runner](https://ci-stats.kibana.dev/trigger_flaky_test_runner/1) was
used on any tests changed
- [X] The PR description includes the appropriate Release Notes section,
and the correct `release_note:*` label is applied per the
[guidelines](https://www.elastic.co/guide/en/kibana/master/contributing.html#kibana-release-notes-process)
- [X] Review the [backport
guidelines](https://docs.google.com/document/d/1VyN5k91e5OVumlc0Gb9RPa3h1ewuPE705nRtioPiTvY/edit?usp=sharing)
and apply applicable `backport:*` labels.

### Identify risks

Does this PR introduce any risks? For example, consider risks like hard
to test bugs, performance regression, potential of data loss.

Describe the risk, its severity, and mitigation for each identified
risk. Invite stakeholders and evaluate how to proceed before merging.

- [ ] [See some risk
examples](https://github.com/elastic/kibana/blob/main/RISK_MATRIX.mdx)
- [ ] ...

---------

Co-authored-by: kibanamachine <[email protected]>
(cherry picked from commit d128d41)

# Conflicts:
#	x-pack/platform/packages/shared/kbn-elastic-assistant/impl/mock/connectors.ts

Author: KDKHD

x-pack/platform/packages/shared/kbn-elastic-assistant/impl/connectorland/use_load_connectors/index.test.tsx

@@ -16,6 +16,7 @@ import {
 
 const mockConnectorsAndExtras = [
   ...mockConnectors,
+  // These connectors are not supported for inference
   {
     ...mockConnectors[0],
     id: 'connector-missing-secrets',
@@ -30,6 +31,16 @@ const mockConnectorsAndExtras = [
     isMissingSecrets: true,
     actionTypeId: '.d3',
   },
+  {
+    ...mockConnectors[0],
+    id: 'connector-text-embedding',
+    name: 'Text Embedding Connector',
+    isMissingSecrets: false,
+    actionTypeId: '.inference',
+    config: {
+      taskType: 'text_embedding',
+    },
+  },
 ];
 
 const connectorsApiResponse = mockConnectorsAndExtras.map((c) => ({
@@ -122,4 +133,22 @@ describe('useLoadConnectors', () => {
     });
     await waitFor(() => expect(toasts.addError).toHaveBeenCalled());
   });
+
+  it('should filter out .inference connectors without chat_completion taskType', async () => {
+    const { result } = renderHook(
+      () => useLoadConnectors({ ...defaultProps, inferenceEnabled: true }),
+      {
+        wrapper: TestProviders,
+      }
+    );
+    await waitFor(() => {
+      const connectorIds = result.current.data?.map((c) => c.id) || [];
+
+      expect(connectorIds).not.toContain('connector-text-embedding');
+      expect(connectorIds).not.toContain('text-embedding-connector-id');
+      expect(connectorIds).not.toContain('sparse-embedding-connector-id');
+      expect(connectorIds).toContain('c29c28a0-20fe-11ee-9386-a1f4d42ec542'); // Regular Inference Connector
+      expect(connectorIds).toContain('connectorId'); // OpenAI connector
+    });
+  });
 });

x-pack/platform/packages/shared/kbn-elastic-assistant/impl/connectorland/use_load_connectors/index.tsx

@@ -13,6 +13,7 @@ import type { IHttpFetchError, HttpSetup } from '@kbn/core-http-browser';
 import type { IToasts } from '@kbn/core-notifications-browser';
 import type { OpenAiProviderType } from '@kbn/stack-connectors-plugin/common/openai/constants';
 import type { SettingsStart } from '@kbn/core-ui-settings-browser';
+import { isSupportedConnector } from '@kbn/inference-common';
 import { getAvailableAiConnectors } from '@kbn/elastic-assistant-common/impl/connectors/get_available_connectors';
 import type { AIConnector } from '../connector_selector';
 import * as i18n from '../translations';
@@ -49,7 +50,11 @@ export const useLoadConnectors = ({
       const connectors = await loadConnectors({ http });
 
       const allAiConnectors = connectors.flatMap((connector) => {
-        if (!connector.isMissingSecrets && actionTypes.includes(connector.actionTypeId)) {
+        if (
+          !connector.isMissingSecrets &&
+          actionTypes.includes(connector.actionTypeId) &&
+          isSupportedConnector(connector)
+        ) {
           const aiConnector: AIConnector = {
             ...connector,
             apiProvider:

x-pack/platform/packages/shared/kbn-elastic-assistant/impl/mock/connectors.ts

@@ -82,15 +82,7 @@ export const mockConnectors: AIConnector[] = [
     isSystemAction: false,
     config: {
       apiProvider: 'OpenAI',
+      taskType: 'chat_completion',
     },
   },
-  {
-    id: 'c29c28a0-20fe-11ee-9396-a1f4d42ec542',
-    name: 'Preconfigured Inference Connector',
-    isMissingSecrets: false,
-    actionTypeId: '.inference',
-    isPreconfigured: true,
-    isDeprecated: false,
-    isSystemAction: false,
-  },
 ];