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/helpers/specs/urlParamsHelper.spec.js

@@ -6,7 +6,7 @@ import {
 
 describe('#buildSearchParamsWithLocale', () => {
   it('returns correct search params', () => {
-    let windowSpy = jest.spyOn(window, 'window', 'get');
+    let windowSpy = vi.spyOn(window, 'window', 'get');
     windowSpy.mockImplementation(() => ({
       WOOT_WIDGET: {
         $root: {

app/javascript/widget/helpers/specs/utils.spec.js

@@ -1,6 +1,6 @@
 import { IFrameHelper } from '../utils';
 
-jest.mock('vue', () => ({
+vi.mock('vue', () => ({
   config: {
     lang: 'el',
   },