chore: another wait for relationship management test

[paula-stacho]

Description

Observed another flake, this time at a later point.

Checklist

• New tests and/or benchmarks are included
• Documentation is changed or added
• If this change updates the UI, screenshots/videos are added and a design review is requested
• I have signed the MongoDB Contributor License Agreement (https://www.mongodb.com/legal/contributor-agreement)

Motivation and Context

• Bugfix
• New feature
• Dependency update
• Misc

Open Questions

Dependents

Types of changes

• Backport Needed
• Patch (non-breaking change which fixes an issue)
• Minor (non-breaking change which adds functionality)
• Major (fix or feature that would cause existing functionality to change)

[Copilot]

Pull Request Overview

This PR adds a wait condition to improve test stability by addressing a flaky test in the data modeling relationship management functionality. The change ensures that the delete button for relationship items is clickable before attempting to interact with it.

• Added waitForClickable() call before clicking the relationship delete button

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