test(cy): rely on @nextcloud/axios for requests

[max-nextcloud]

Simplify the handling of csrf-tokens and auth.

🏁 Checklist

• [x] Code is properly formatted (npm run lint / npm run stylelint / composer run cs:check)
• [x] Sign-off message is added to all commits
• Simplifying tests.
• No documentation needed.

[max-nextcloud]

~~I have no idea why this is not running the cypress tests. Somehow the initial job does not seem to get started.~~ Looks like one runner of a previous test get stuck. Canceled it and now tests are running for the latest commit.

[max-nextcloud]

Currently crashes the browser for me when running cypress test for direct editing. I think we've seen that as well when testing a cypress upgrade. Will set to draft until I manage to resolve it.

[juliusknorr]

Very nice cleanup 🚀

[mejo-]

/backport to stable29

[mejo-]

/backport to stable28

[mejo-]

/backport to stable29