Navigation: show breadcrumbs correctly when on the home page (#55759)

* show breadcrumbs correctly when on the home page

* adjust breadcrumb unit tests

* update betterer

* fix backend tests

* update getSectionRoot to look at the home nav id

* remove redundant setting of home dashboard

* construct a home navmodelitem in the backend

* fix cases when the feature toggle is off

* fix unit test

* fix more unit tests

* refactor how buildBreadcrumbs works

* use HOME_NAV_ID

* move homeNav useSelector into NavToolbar

* remove unnecesary cloneDeep

* don't need locationUtil here

* restore using getUrlForPartial in DashboardPage

* special case for the editview query param

* remove commented out code

* add comment to clarify splice behaviour

* slightly cleaner syntax

public/app/features/teams/TeamMembers.test.tsx

@@ -21,6 +21,7 @@ jest.mock('@grafana/runtime', () => ({
     get: jest.fn().mockResolvedValue([{ userId: 1, login: 'Test' }]),
   }),
   config: {
+    ...jest.requireActual('@grafana/runtime').config,
     bootData: { navTree: [], user: {} },
   },
 }));