[Dashboard] Only cache non-alias dashboards (#175635)

## Summary

This PR fixes the alias redirect problem that was noted in the attached
SDH.

For context, as part of the [Links panel
work](#166896), I added [dashboard
caching](#162285) to make
navigation more efficient - however, when implementing this, I did not
consider the redirect behaviour.

Specifically, we were **always** adding dashboards to the cache, even if
the load outcome meant a redirect was necessary - so, because the meta
info for the dashboard fetch result was cached, this meant that the
`'aliasMatch'` outcome was **also** cached. Because of this, after a
redirect happened, the second attempt to load the dashboard would return
the result from the **cache** rather than fetching the dashboard from
the CM client - but, as described previously, the cached dashboard would
still appear as though it required a redirect because the cached outcome
was `'aliasMatch'`.

Therefore, because of hitting this early return on **both** fetch
attempts (before the redirect, after the redirect)...


https://github.com/elastic/kibana/blob/4565b1bfba91cd24f73f8ce37fa7be73283a4453/src/plugins/dashboard/public/dashboard_container/embeddable/create/create_dashboard.ts#L165-L171

... the dashboard information would not get updated. _(Oof!)_ 

Despite the lengthy description of the problem, the solution is quite
simple - just don't add dashboards to the cache if they require a
redirect. And then everything works! 🎉

### Videos
**Before**


https://github.com/elastic/kibana/assets/8698078/983b81a6-acf3-4e71-804a-6ed75c36896f


**After**


https://github.com/elastic/kibana/assets/8698078/028369ff-f73f-43e6-9abb-b35f0d2f33e1


### Testing
To test, I followed the directions from [this PR
description](#163658) to get a
dashboard that requires a redirect - then, I created a markdown panel
with the **old** (from the Default space) dashboard ID in the new space
to see the same redirect behaviour that the customer in the SDH was
seeing.

### Checklist
- [x] This was checked for [cross-browser
compatibility](https://www.elastic.co/support/matrix#matrix_browsers)
- [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

### For maintainers

- [ ] This was checked for breaking API changes and was [labeled
appropriately](https://www.elastic.co/guide/en/kibana/master/contributing.html#kibana-release-notes-process)

src/plugins/dashboard/public/services/dashboard_content_management/lib/load_dashboard_state.test.ts

@@ -0,0 +1,81 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+import { registry } from '../../plugin_services.stub';
+import { pluginServices } from '../../plugin_services';
+import { getSampleDashboardInput } from '../../../mocks';
+import { loadDashboardState } from './load_dashboard_state';
+import { dashboardContentManagementCache } from '../dashboard_content_management_service';
+
+pluginServices.setRegistry(registry.start({}));
+const { data, embeddable, contentManagement, savedObjectsTagging } = pluginServices.getServices();
+
+const allServices = {
+  data,
+  embeddable,
+  contentManagement,
+  savedObjectsTagging,
+};
+
+describe('Load dashboard state', () => {
+  it('should return cached result if available', async () => {
+    dashboardContentManagementCache.fetchDashboard = jest.fn().mockImplementation((id: string) => {
+      return {
+        item: {
+          id,
+          version: 1,
+          references: [],
+          type: 'dashboard',
+          attributes: {
+            kibanaSavedObjectMeta: { searchSourceJSON: '' },
+            title: 'Test dashboard',
+          },
+        },
+        meta: {},
+      };
+    });
+    dashboardContentManagementCache.addDashboard = jest.fn();
+    contentManagement.client.get = jest.fn();
+
+    const { id } = getSampleDashboardInput();
+    const result = await loadDashboardState({
+      id,
+      ...allServices,
+    });
+    expect(dashboardContentManagementCache.fetchDashboard).toBeCalled();
+    expect(dashboardContentManagementCache.addDashboard).not.toBeCalled();
+    expect(contentManagement.client.get).not.toBeCalled();
+    expect(result).toMatchObject({
+      dashboardId: id,
+      dashboardFound: true,
+      dashboardInput: {
+        title: 'Test dashboard',
+      },
+    });
+  });
+
+  it('should not add to cache for alias redirect result', async () => {
+    dashboardContentManagementCache.fetchDashboard = jest.fn().mockImplementation(() => undefined);
+    dashboardContentManagementCache.addDashboard = jest.fn();
+    contentManagement.client.get = jest.fn().mockImplementation(({ id }) => {
+      return Promise.resolve({
+        item: { id },
+        meta: {
+          outcome: 'aliasMatch',
+        },
+      });
+    });
+    const { id } = getSampleDashboardInput();
+    await loadDashboardState({
+      id,
+      ...allServices,
+    });
+    expect(dashboardContentManagementCache.fetchDashboard).toBeCalled();
+    expect(dashboardContentManagementCache.addDashboard).not.toBeCalled();
+  });
+});

src/plugins/dashboard/public/services/dashboard_content_management/lib/load_dashboard_state.ts

@@ -63,8 +63,8 @@ export const loadDashboardState = async ({
   /**
    * Load the saved object from Content Management
    */
-  let rawDashboardContent;
-  let resolveMeta;
+  let rawDashboardContent: DashboardCrudTypes['GetOut']['item'];
+  let resolveMeta: DashboardCrudTypes['GetOut']['meta'];
 
   const cachedDashboard = dashboardContentManagementCache.fetchDashboard(id);
   if (cachedDashboard) {
@@ -81,8 +81,15 @@ export const loadDashboardState = async ({
         throw new SavedObjectNotFound(DASHBOARD_CONTENT_ID, id);
       });
 
-    dashboardContentManagementCache.addDashboard(result);
     ({ item: rawDashboardContent, meta: resolveMeta } = result);
+    const { outcome: loadOutcome } = resolveMeta;
+    if (loadOutcome !== 'aliasMatch') {
+      /**
+       * Only add the dashboard to the cache if it does not require a redirect - otherwise, the meta
+       * alias info gets cached and prevents the dashboard contents from being updated
+       */
+      dashboardContentManagementCache.addDashboard(result);
+    }
   }
 
   if (!rawDashboardContent || !rawDashboardContent.version) {