Introduce cypress component testing ICSHWI-9018

This merge request adds some initial component testing with Cypress. It makes the following changes

• Installs cypress component testing dependencies
• Updates the cypress configuration (cypress.json and cypress/plugins/index.js) to run component test
• Updates jest configuration to ignore cypress component tests
• Introduces a patch to change the configuration of the "react-error-overlay" in create-react-app to only appear for errors
• Mocks some parts of the API required for component tests
• Adds some first tests for APIProvider, UserProvider, TokenRenew, and NotificationProvider (these are not exhaustive)
• Updates gitlab-ci configuration to run cypress component tests in CI

To run the component tests, use npx cypress open-ct

requested review from @imretoth and @zoltanrunyo

assigned to @johnsparger

changed title from Introduce cypress component testing to Introduce cypress component testing ICSHWI-9018

mentioned in merge request !132 (closed)

approved this merge request

mentioned in commit 0760f894

merged