Add E2E tests for copying and moving shared groupfolders

[danxuliu]

This pull request adds E2E tests for the issue fixed in nextcloud/server#47847 (some scenarios are fixed by that pull request, other scenarios work fine already but were added for completion).

~~[skip ci] was used for now until the fix is merged, as otherwise running one of the scenarios would recursively copy the data directory of the Nextcloud server and maybe cause issues in CI.~~

[artonge]

They seem to be failing though

[provokateurin]

@danxuliu can you rebase and check if everything passes now?

[danxuliu]

In the rebase the helper functions were updated to the latest server version (so they now take into account the change in how internal shares are created since Nextcloud 31) and it was no longer needed to add one of them (createFolder) as it was added to the cypress code of groupfolders in the meantime. The tests themselves were not modified.

The tests were run locally several times and they always passed, let's see what CI says :crossed_fingers:

[danxuliu]

The tests were run locally several times and they always passed, let's see what CI says 🤞

Well, all tests failed :shrug: The problems seem to be that showing the list of possible shares takes more than 4 seconds and... that the session is lost while creating the share so a new one is started, but the following requests fail as being unauthenticated due to the new session not being logged in? I do not have any idea of what is going on :smiling_face_with_tear:

[artonge]

I used saveState/restoreState to reduce the amount of duplicate operations during the setup phase. I also raised the timeout, it seems to work for now.