LLMApp: Skip 404 requests to know if the plugin exists (#85226)

---------

Co-authored-by: Ivan Ortega <ivanortegaalba@gmail.com>

public/app/features/dashboard/components/GenAI/utils.test.ts

@@ -16,6 +16,16 @@ jest.mock('@grafana/experimental', () => ({
   },
 }));
 
+jest.mock('@grafana/runtime', () => ({
+  ...jest.requireActual('@grafana/runtime'),
+  config: {
+    ...jest.requireActual('@grafana/runtime').config,
+    apps: {
+      'grafana-llm-app': true,
+    },
+  },
+}));
+
 describe('getDashboardChanges', () => {
   it('should correctly split user changes and migration changes', () => {
     // Mock data for testing

public/app/features/dashboard/components/GenAI/utils.ts

@@ -1,6 +1,7 @@
 import { pick } from 'lodash';
 
 import { llms } from '@grafana/experimental';
+import { config } from '@grafana/runtime';
 import { Panel } from '@grafana/schema';
 
 import { DashboardModel, PanelModel } from '../../state';
@@ -63,6 +64,10 @@ export function getDashboardChanges(dashboard: DashboardModel): {
  * @returns true if the LLM plugin is enabled.
  */
 export async function isLLMPluginEnabled() {
+  if (!config.apps['grafana-llm-app']) {
+    return false;
+  }
+
   // Check if the LLM plugin is enabled.
   // If not, we won't be able to make requests, so return early.
   return llms.openai.health().then((response) => response.ok);