[cypress] Use GitHub action service for Nextcloud server

[susnux]

Summary

Follow up on #41250

This changes the Cypress workflow to not start a docker container from Cypress but use a GitHub workflow service as the Nextcloud container.
This saves ~2 minutes CI time per Cypress runner (currently 3).

Also the service is up when the workflow starts meaning cypress does not have to wait for it and should no longer time out.

Checklist

• Code is properly formatted
• Sign-off message is added to all commits

[skjnldsv]

This saves ~2 minutes CI time per Cypress runner (currently 3).

Do you know why? I mean, both are running docker? This look like a crazy difference 🤯

[susnux]

Do you know why? I mean, both are running docker? This look like a crazy difference 🤯

I guess because services are cached and created on the beginn while manually starting docker happens on step evaluation

[max-nextcloud]

Interesting approach.

I'd be happy to save 2 min per cypress runner.

I'm wondering if there are any downsides to this but can't think of any. The only thing that comes to my mind is that we may need to maintain multiple images at some point so once this lands on stable branches they still have a container that works for them. But i guess we'll need the images anyway and can just configure them in the cypress.yml accordingly.

[skjnldsv]

Seems like it's failing much more randomly with that PR 🤔

[skjnldsv]

navigation-bar-settings.cy.ts is really failing

[skjnldsv]

Error response from daemon: No such container: nextcloud-cypress-tests-server

Cypress failure handling needs a fix