Add Cypress Testing Library #24906
Description
Our Jest tests are currently written by using testing library. These tests are interacting with the components like users would do.
On the other hand our Cypress end-to-end tests do highly depend on CSS / DOM structure.
With adding https://github.com/testing-library/cypress-testing-library we can align both worlds. Cypress Testing Library defines Cypress commands for all find… function, that exist in Testing Library.