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/mixins/specs/uiSettings.spec.js

@@ -14,7 +14,7 @@ describe('uiSettingsMixin', () => {
   let store;
 
   beforeEach(() => {
-    actions = { updateUISettings: jest.fn(), toggleSidebarUIState: jest.fn() };
+    actions = { updateUISettings: vi.fn(), toggleSidebarUIState: vi.fn() };
     getters = {
       getUISettings: () => ({
         enter_to_send_enabled: false,