ICSHWI-12040: Upgrade Cypress

This work upgrades Cypress from version 9 to 12.

• There were major / breaking changes between 9 and 10 to to several API changes in Cypress, and also due to some dependency changes.
  • mount now lives on cy
  • conversion of json configuration to js configuration
  • separation of config into e2e and component testing separately
  • dependencies on webpack-dev-server have been removed; they are now bundled with cypress
  • One particular issue caused (superficially) by react's error overlay failing tests has been fixed; the old solution using node_modules patching has been removed (but for the record, if the webpack dev server settings have to be modified, they can now be done from the cypress config; patching is not necessary)
• No problems from 10 to 11
• No problems from 11 to 12