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/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 = {