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/widget/store/modules/specs/campaign/actions.spec.js

@@ -2,12 +2,16 @@ import { API } from 'widget/helpers/axios';
 import { actions } from '../../campaign';
 import { campaigns } from './data';
 
-const commit = jest.fn();
-const dispatch = jest.fn();
-jest.mock('widget/helpers/axios');
+const commit = vi.fn();
+const dispatch = vi.fn();
+vi.mock('widget/helpers/axios');
 
 import campaignTimer from 'widget/helpers/campaignTimer';
-jest.mock('widget/helpers/campaignTimer');
+vi.mock('widget/helpers/campaignTimer', () => ({
+  default: {
+    initTimers: vi.fn().mockReturnValue({ mock: true }),
+  },
+}));
 
 describe('#actions', () => {
   describe('#fetchCampaigns', () => {

app/javascript/widget/store/modules/specs/campaign/getters.spec.js

@@ -1,7 +1,8 @@
 import { getters } from '../../campaign';
 import { campaigns } from './data';
-jest.mock('widget/store/index.js');
-
+vi.mock('widget/store/index.js', () => ({
+  default: {},
+}));
 describe('#getters', () => {
   it('getCampaigns', () => {
     const state = {

app/javascript/widget/store/modules/specs/campaign/mutations.spec.js

@@ -1,6 +1,9 @@
 import { mutations } from '../../campaign';
 import { campaigns } from './data';
-jest.mock('widget/store/index.js');
+vi.mock('widget/store/index.js', () => ({
+  default: {},
+}));
+
 describe('#mutations', () => {
   describe('#setCampaigns', () => {
     it('set campaign records', () => {