feat: Use vitest instead of jest, run all the specs anywhere in app/ folder in the CI (#9722)

Due to the pattern `**/specs/*.spec.js` defined in CircleCI, none of the
frontend spec in the folders such as
`specs/<domain-name>/getters.spec.js` were not executed in Circle CI.

This PR fixes the issue, along with the following changes: 
- Use vitest instead of jest
- Remove jest dependancies
- Update tests to work with vitest

---------

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

app/javascript/dashboard/components/layout/sidebarComponents/specs/NotificationBell.spec.js

@@ -1,13 +1,15 @@
-import NotificationBell from '../NotificationBell';
+import NotificationBell from '../NotificationBell.vue';
 import { createLocalVue, shallowMount } from '@vue/test-utils';
 import Vuex from 'vuex';
 import VueI18n from 'vue-i18n';
+import FluentIcon from 'shared/components/FluentIcon/DashboardIcon.vue';
 
 import i18n from 'dashboard/i18n';
 
 const localVue = createLocalVue();
 localVue.use(Vuex);
 localVue.use(VueI18n);
+localVue.component('fluent-icon', FluentIcon);
 
 const i18nConfig = new VueI18n({
   locale: 'en',
@@ -27,7 +29,7 @@ describe('notificationBell', () => {
 
   beforeEach(() => {
     actions = {
-      showNotification: jest.fn(),
+      showNotification: vi.fn(),
     };
     modules = {
       auth: {