[tests-only] Add wait until sync in `editfile` suite

[amrita-shrestha]

Description

This PR adds the wait until sync step in the tst_editfile suite to solve the intermittent failure

In the investigation, it was found that the file was not synced in the server from the desktop properly.

Related issue

[QA] Scenario Modify original content of a file with special character failed at execution through middleware in CI

[amrita-shrestha]

Successfully passed while running 25 times in CI after adding wait-until-sync step

[ownclouders]

Results for GUI-tests https://drone.owncloud.com/owncloud/client/12713/6/1

:boom: The GUI tests failed.

GUI Logs: https://cache.owncloud.com/public/owncloud/client/12713/guiReportUpload/index.html

Server Logs: https://cache.owncloud.com/public/owncloud/client/12713/guiReportUpload/serverlog.log

Screenshots:

• Filenames_that_are_rejected_by_the_server_are_reported.png
• Sync_all_is_selected_by_default.png
• Sync_only_one_folder_from_the_server.png

[sonarcloud[bot]]

Kudos, SonarCloud Quality Gate passed!   

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[amrita-shrestha]

currently, GUI test in client skipped so shifting to block

[saw-jan]

I will do in this PR https://github.com/owncloud/client/pull/10088