test(editor): Update workflow actions tests for the new canvas (no-changelog)

[MiloradFilipovic]

Summary

• Updating 7-workflow-actions.cy.ts to work with new canvas
• Preventing saving already saved workflows on the new canvas

Review / Merge checklist

• [ ] PR title and summary are descriptive. (conventions)
• [ ] Docs updated or follow-up ticket created.
• [ ] Tests included.
• [ ] PR Labeled with release/backport (if the PR is an urgent fix that needs to be backported)