Migrate taiko tests to cypress

Ordered by importance:

• Grafana (#1352 (closed)) (failing often in main pipeline, i.e. https://open.greenhost.net/stackspin/stackspin/-/jobs/240282)
• Wekan (failing often in main pipeline, i.e. #1291 (closed) or https://open.greenhost.net/stackspin/stackspin/-/jobs/239589)
• Nextcloud (#1307 (closed))
• Dashboard
• Wordpress
• Zulip
• Replace all taiko references with e2e in .gitlab/
• Remove tests/taiko
• Integrate cypress tests into Stackspin cli