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/utils.spec.js

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