Chore: Remove old storybook-verification cypress test (#108696)

* add check for frontend code changing

* remove cache

* add to pr-e2e-tests instead

* fix CODEOWNERS

* remove cypress test

e2e/storybook/verify.spec.ts

@@ -1,14 +0,0 @@
-// very basic test to verify that the button story loads correctly
-// this is only intended to catch some basic build errors with storybook
-// NOTE: storybook must already be running (`yarn storybook`) for this test to work
-describe('Verify storybook', () => {
-  it('Loads the button story correctly', () => {
-    cy.visit('?path=/story/inputs-button--basic');
-    getIframeBody().find('button:contains("Example button")').should('be.visible');
-  });
-});
-
-// see https://www.cypress.io/blog/2020/02/12/working-with-iframes-in-cypress
-function getIframeBody() {
-  return cy.get('#storybook-preview-iframe').its('0.contentDocument.body').should('not.be.empty').then(cy.wrap);
-}